---
_id: '61932'
abstract:
- lang: eng
  text: <jats:p>Substantial improvements in the performance of optical interconnects
    based on multi-mode fibers are required to support emerging single-channel data
    transmission rates of 200 Gb/s and 400 Gb/s. Future optical components must combine
    very high modulation bandwidths—supporting signaling at 100 Gbaud and 200 Gbaud—with
    reduced spectral width to mitigate chromatic-dispersion-induced pulse broadening
    and increased brightness to further restrict flux-confining area in multi-mode
    fibers and thereby increase the effective modal bandwidth (EMB). A particularly
    promising route to improved performance within standard oxide-confined VCSEL technology
    is the introduction of multiple isolated or optically coupled oxide-confined apertures,
    which we refer to collectively as multi-aperture (MA) VCSEL arrays. We show that
    properly designed MA VCSELs exhibit narrow emission spectra, narrow far-field
    profiles and extended intrinsic modulation bandwidths, enabling longer-reach data
    transmission over both multi-mode (MMF) and single-mode fibers (SMF). One approach
    uses optically isolated apertures with lateral dimensions of approximately 2–3
    µm arranged with a pitch of 10–12 µm or less. Such devices demonstrate relaxation
    oscillation frequencies of around 30 GHz in continuous-wave operation and intrinsic
    modulation bandwidths approaching 50 GHz. Compared with a conventional single-aperture
    VCSELs of equivalent oxide-confined area, MA designs can reduce the spectral width
    (root mean square values &lt; 0.15 nm), lower series resistance (≈50 Ω) and limit
    junction overheating through more efficient multi-spot heat dissipation at the
    same total current. As each aperture lases in a single transverse mode, these
    devices exhibit narrow far-field patterns. In combination with well-defined spacing
    between emitting spots, they permit tailored restricted launch conditions in MMFs,
    enhancing effective modal bandwidth. In another MA approach, the apertures are
    optically coupled such that self-injection locking (SIL) leads to lasing in a
    single supermode. One may regard one of the supermodes as acting as a master mode
    controlling the other one. Streak-camera studies reveal post-pulse oscillations
    in the SIL regime at frequencies up to 100 GHz. MA VCSELs enable a favorable combination
    of wavelength chirp and chromatic dispersion, extending transmission distances
    over MMFs beyond those expected for zero-chirp sources and supporting transfer
    bandwidths up to 60 GHz over kilometer-length SMF links.</jats:p>
article_number: '1037'
author:
- first_name: Nikolay N.
  full_name: Ledentsov, Nikolay N.
  last_name: Ledentsov
- first_name: Nikolay
  full_name: Ledentsov, Nikolay
  last_name: Ledentsov
- first_name: Vitaly A.
  full_name: Shchukin, Vitaly A.
  last_name: Shchukin
- first_name: Alexander N.
  full_name: Ledentsov, Alexander N.
  last_name: Ledentsov
- first_name: Oleg Yu.
  full_name: Makarov, Oleg Yu.
  last_name: Makarov
- first_name: Ilya E.
  full_name: Titkov, Ilya E.
  last_name: Titkov
- first_name: Markus
  full_name: Lindemann, Markus
  last_name: Lindemann
- first_name: Thomas
  full_name: de Adelsburg Ettmayer, Thomas
  last_name: de Adelsburg Ettmayer
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin R.
  full_name: Hofmann, Martin R.
  last_name: Hofmann
- first_name: Xin
  full_name: Chen, Xin
  last_name: Chen
- first_name: Jason E.
  full_name: Hurley, Jason E.
  last_name: Hurley
- first_name: Hao
  full_name: Dong, Hao
  last_name: Dong
- first_name: Ming-Jun
  full_name: Li, Ming-Jun
  last_name: Li
citation:
  ama: 'Ledentsov NN, Ledentsov N, Shchukin VA, et al. VCSELs: Influence of Design
    on Performance and Data Transmission over Multi-Mode and Single-Mode Fibers. <i>Photonics</i>.
    2025;12(10). doi:<a href="https://doi.org/10.3390/photonics12101037">10.3390/photonics12101037</a>'
  apa: 'Ledentsov, N. N., Ledentsov, N., Shchukin, V. A., Ledentsov, A. N., Makarov,
    O. Yu., Titkov, I. E., Lindemann, M., de Adelsburg Ettmayer, T., Gerhardt, N.
    C., Hofmann, M. R., Chen, X., Hurley, J. E., Dong, H., &#38; Li, M.-J. (2025).
    VCSELs: Influence of Design on Performance and Data Transmission over Multi-Mode
    and Single-Mode Fibers. <i>Photonics</i>, <i>12</i>(10), Article 1037. <a href="https://doi.org/10.3390/photonics12101037">https://doi.org/10.3390/photonics12101037</a>'
  bibtex: '@article{Ledentsov_Ledentsov_Shchukin_Ledentsov_Makarov_Titkov_Lindemann_de
    Adelsburg Ettmayer_Gerhardt_Hofmann_et al._2025, title={VCSELs: Influence of Design
    on Performance and Data Transmission over Multi-Mode and Single-Mode Fibers},
    volume={12}, DOI={<a href="https://doi.org/10.3390/photonics12101037">10.3390/photonics12101037</a>},
    number={101037}, journal={Photonics}, publisher={MDPI AG}, author={Ledentsov,
    Nikolay N. and Ledentsov, Nikolay and Shchukin, Vitaly A. and Ledentsov, Alexander
    N. and Makarov, Oleg Yu. and Titkov, Ilya E. and Lindemann, Markus and de Adelsburg
    Ettmayer, Thomas and Gerhardt, Nils Christopher and Hofmann, Martin R. and et
    al.}, year={2025} }'
  chicago: 'Ledentsov, Nikolay N., Nikolay Ledentsov, Vitaly A. Shchukin, Alexander
    N. Ledentsov, Oleg Yu. Makarov, Ilya E. Titkov, Markus Lindemann, et al. “VCSELs:
    Influence of Design on Performance and Data Transmission over Multi-Mode and Single-Mode
    Fibers.” <i>Photonics</i> 12, no. 10 (2025). <a href="https://doi.org/10.3390/photonics12101037">https://doi.org/10.3390/photonics12101037</a>.'
  ieee: 'N. N. Ledentsov <i>et al.</i>, “VCSELs: Influence of Design on Performance
    and Data Transmission over Multi-Mode and Single-Mode Fibers,” <i>Photonics</i>,
    vol. 12, no. 10, Art. no. 1037, 2025, doi: <a href="https://doi.org/10.3390/photonics12101037">10.3390/photonics12101037</a>.'
  mla: 'Ledentsov, Nikolay N., et al. “VCSELs: Influence of Design on Performance
    and Data Transmission over Multi-Mode and Single-Mode Fibers.” <i>Photonics</i>,
    vol. 12, no. 10, 1037, MDPI AG, 2025, doi:<a href="https://doi.org/10.3390/photonics12101037">10.3390/photonics12101037</a>.'
  short: N.N. Ledentsov, N. Ledentsov, V.A. Shchukin, A.N. Ledentsov, O.Yu. Makarov,
    I.E. Titkov, M. Lindemann, T. de Adelsburg Ettmayer, N.C. Gerhardt, M.R. Hofmann,
    X. Chen, J.E. Hurley, H. Dong, M.-J. Li, Photonics 12 (2025).
date_created: 2025-10-23T10:59:59Z
date_updated: 2026-02-19T12:39:12Z
department:
- _id: '977'
doi: 10.3390/photonics12101037
intvolume: '        12'
issue: '10'
language:
- iso: eng
publication: Photonics
publication_identifier:
  issn:
  - 2304-6732
publication_status: published
publisher: MDPI AG
status: public
title: 'VCSELs: Influence of Design on Performance and Data Transmission over Multi-Mode
  and Single-Mode Fibers'
type: journal_article
user_id: '15911'
volume: 12
year: '2025'
...
---
_id: '61931'
abstract:
- lang: eng
  text: <jats:p>Recent research revealed that single-mode vertical-cavity surface-emitting
    lasers under spin injection (spin-VCSELs) have the potential to revolutionize
    laser technology for short-haul optical communications. While previous studies
    have focused solely on single-mode operation, this study introduces multimode
    spin-VCSELs. We experimentally demonstrate the existence of multi-resonant polarization
    dynamics when spin is injected, a phenomenon previously unobserved. The development
    opens the door to significantly faster and more efficient optical communication
    systems by harnessing the collective behavior of multiple laser modes. Furthermore,
    we lay the groundwork for understanding multimode operation through the extension
    of the single-mode spin–flip model, which forms the basis for present and future
    analyses of multimode spin-laser operation. This work is an important step toward
    realizing the full potential of spin-VCSELs and, thus, enables significantly improved
    performance of spin-VCSEL-based optical networks in the future.</jats:p>
article_number: '106120'
author:
- first_name: Uliana
  full_name: Diiankova, Uliana
  last_name: Diiankova
- first_name: Mariusz
  full_name: Drong, Mariusz
  last_name: Drong
- first_name: Tobias
  full_name: Pusch, Tobias
  last_name: Pusch
- first_name: Rainer
  full_name: Michalzik, Rainer
  last_name: Michalzik
- first_name: Markus
  full_name: Lindemann, Markus
  last_name: Lindemann
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin R.
  full_name: Hofmann, Martin R.
  last_name: Hofmann
citation:
  ama: Diiankova U, Drong M, Pusch T, et al. Multimode vertical-cavity surface-emitting
    lasers under spin injection. <i>APL Photonics</i>. 2025;10(10). doi:<a href="https://doi.org/10.1063/5.0286998">10.1063/5.0286998</a>
  apa: Diiankova, U., Drong, M., Pusch, T., Michalzik, R., Lindemann, M., Gerhardt,
    N. C., &#38; Hofmann, M. R. (2025). Multimode vertical-cavity surface-emitting
    lasers under spin injection. <i>APL Photonics</i>, <i>10</i>(10), Article 106120.
    <a href="https://doi.org/10.1063/5.0286998">https://doi.org/10.1063/5.0286998</a>
  bibtex: '@article{Diiankova_Drong_Pusch_Michalzik_Lindemann_Gerhardt_Hofmann_2025,
    title={Multimode vertical-cavity surface-emitting lasers under spin injection},
    volume={10}, DOI={<a href="https://doi.org/10.1063/5.0286998">10.1063/5.0286998</a>},
    number={10106120}, journal={APL Photonics}, publisher={AIP Publishing}, author={Diiankova,
    Uliana and Drong, Mariusz and Pusch, Tobias and Michalzik, Rainer and Lindemann,
    Markus and Gerhardt, Nils Christopher and Hofmann, Martin R.}, year={2025} }'
  chicago: Diiankova, Uliana, Mariusz Drong, Tobias Pusch, Rainer Michalzik, Markus
    Lindemann, Nils Christopher Gerhardt, and Martin R. Hofmann. “Multimode Vertical-Cavity
    Surface-Emitting Lasers under Spin Injection.” <i>APL Photonics</i> 10, no. 10
    (2025). <a href="https://doi.org/10.1063/5.0286998">https://doi.org/10.1063/5.0286998</a>.
  ieee: 'U. Diiankova <i>et al.</i>, “Multimode vertical-cavity surface-emitting lasers
    under spin injection,” <i>APL Photonics</i>, vol. 10, no. 10, Art. no. 106120,
    2025, doi: <a href="https://doi.org/10.1063/5.0286998">10.1063/5.0286998</a>.'
  mla: Diiankova, Uliana, et al. “Multimode Vertical-Cavity Surface-Emitting Lasers
    under Spin Injection.” <i>APL Photonics</i>, vol. 10, no. 10, 106120, AIP Publishing,
    2025, doi:<a href="https://doi.org/10.1063/5.0286998">10.1063/5.0286998</a>.
  short: U. Diiankova, M. Drong, T. Pusch, R. Michalzik, M. Lindemann, N.C. Gerhardt,
    M.R. Hofmann, APL Photonics 10 (2025).
date_created: 2025-10-23T10:52:59Z
date_updated: 2026-02-19T12:39:00Z
department:
- _id: '977'
doi: 10.1063/5.0286998
intvolume: '        10'
issue: '10'
language:
- iso: eng
publication: APL Photonics
publication_identifier:
  issn:
  - 2378-0967
publication_status: published
publisher: AIP Publishing
status: public
title: Multimode vertical-cavity surface-emitting lasers under spin injection
type: journal_article
user_id: '15911'
volume: 10
year: '2025'
...
---
_id: '64551'
abstract:
- lang: eng
  text: <jats:p>Laterally coupled vertical-cavity surface-emitting lasers (VCSELs)
    can exhibit additional resonances at high modulation frequencies that can substantially
    increase the laser’s modulation bandwidth. State-of-the-art laterally coupled
    devices require non-standard manufacturing technology and precise tuning of the
    currents supplied to each cavity separately to form optical supermodes suitable
    for such resonances. Here, we report on a novel switching phenomenon in laterally
    coupled VCSEL structures having only a single common electric contact and manufactured
    in a standard oxide-confined VCSEL geometry. At lower currents, they can be operated
    in a weakly coupled (WCR) regime and, at higher currents, in an injection-locked
    (IL) regime, enabling fundamentally different spectral and dynamic features. In
    the WCR, both optical supermodes lase and a narrow tunable plasma-assisted peak
    at their beating frequency is observed for each of the apertures, with a current-dependent
    frequency tuning and anti-phase intensity oscillations in each of the cavities.
    In contrast, in the IL regimes, only one (anti-symmetric) supermode lases. This
    adds a broader resonance to the modulation response while the intensity oscillations
    in both cavities are in-phase. Only the IL regime can result in increased modulation
    bandwidth of the system. Measurements of the pulse responses and continuous modulation
    up to 70 GHz for both operational regimes are presented and compared with simulations
    of our distributed rate equation model whose parameters are extracted from full-wave
    electromagnetic simulations of the device, including the temperature distribution
    in the device. Excellent agreement is found and enables comprehensive understanding
    of the dynamics of supermodes in oxide-confined coupled cavity VCSELs.</jats:p>
article_number: '053102'
author:
- first_name: M.
  full_name: Lindemann, M.
  last_name: Lindemann
- first_name: M.
  full_name: D’Alessandro, M.
  last_name: D’Alessandro
- first_name: N.
  full_name: Ledentsov, N.
  last_name: Ledentsov
- first_name: O. Y.
  full_name: Makarov, O. Y.
  last_name: Makarov
- first_name: N. N.
  full_name: Ledentsov, N. N.
  last_name: Ledentsov
- first_name: A.
  full_name: Tibaldi, A.
  last_name: Tibaldi
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: M. R.
  full_name: Hofmann, M. R.
  last_name: Hofmann
citation:
  ama: Lindemann M, D’Alessandro M, Ledentsov N, et al. Laterally coupled vertical-cavity
    surface-emitting lasers with                    tunable resonance width and frequency.
    <i>Journal of Applied Physics</i>. 2025;138(5). doi:<a href="https://doi.org/10.1063/5.0275622">10.1063/5.0275622</a>
  apa: Lindemann, M., D’Alessandro, M., Ledentsov, N., Makarov, O. Y., Ledentsov,
    N. N., Tibaldi, A., Gerhardt, N. C., &#38; Hofmann, M. R. (2025). Laterally coupled
    vertical-cavity surface-emitting lasers with                    tunable resonance
    width and frequency. <i>Journal of Applied Physics</i>, <i>138</i>(5), Article
    053102. <a href="https://doi.org/10.1063/5.0275622">https://doi.org/10.1063/5.0275622</a>
  bibtex: '@article{Lindemann_D’Alessandro_Ledentsov_Makarov_Ledentsov_Tibaldi_Gerhardt_Hofmann_2025,
    title={Laterally coupled vertical-cavity surface-emitting lasers with         
              tunable resonance width and frequency}, volume={138}, DOI={<a href="https://doi.org/10.1063/5.0275622">10.1063/5.0275622</a>},
    number={5053102}, journal={Journal of Applied Physics}, publisher={AIP Publishing},
    author={Lindemann, M. and D’Alessandro, M. and Ledentsov, N. and Makarov, O. Y.
    and Ledentsov, N. N. and Tibaldi, A. and Gerhardt, Nils Christopher and Hofmann,
    M. R.}, year={2025} }'
  chicago: Lindemann, M., M. D’Alessandro, N. Ledentsov, O. Y. Makarov, N. N. Ledentsov,
    A. Tibaldi, Nils Christopher Gerhardt, and M. R. Hofmann. “Laterally Coupled Vertical-Cavity
    Surface-Emitting Lasers with                    Tunable Resonance Width and Frequency.”
    <i>Journal of Applied Physics</i> 138, no. 5 (2025). <a href="https://doi.org/10.1063/5.0275622">https://doi.org/10.1063/5.0275622</a>.
  ieee: 'M. Lindemann <i>et al.</i>, “Laterally coupled vertical-cavity surface-emitting
    lasers with                    tunable resonance width and frequency,” <i>Journal
    of Applied Physics</i>, vol. 138, no. 5, Art. no. 053102, 2025, doi: <a href="https://doi.org/10.1063/5.0275622">10.1063/5.0275622</a>.'
  mla: Lindemann, M., et al. “Laterally Coupled Vertical-Cavity Surface-Emitting Lasers
    with                    Tunable Resonance Width and Frequency.” <i>Journal of
    Applied Physics</i>, vol. 138, no. 5, 053102, AIP Publishing, 2025, doi:<a href="https://doi.org/10.1063/5.0275622">10.1063/5.0275622</a>.
  short: M. Lindemann, M. D’Alessandro, N. Ledentsov, O.Y. Makarov, N.N. Ledentsov,
    A. Tibaldi, N.C. Gerhardt, M.R. Hofmann, Journal of Applied Physics 138 (2025).
date_created: 2026-02-20T11:11:12Z
date_updated: 2026-02-20T11:15:05Z
department:
- _id: '977'
doi: 10.1063/5.0275622
intvolume: '       138'
issue: '5'
language:
- iso: eng
publication: Journal of Applied Physics
publication_identifier:
  issn:
  - 0021-8979
  - 1089-7550
publication_status: published
publisher: AIP Publishing
status: public
title: Laterally coupled vertical-cavity surface-emitting lasers with                    tunable
  resonance width and frequency
type: journal_article
user_id: '15911'
volume: 138
year: '2025'
...
---
_id: '64293'
author:
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin R.
  full_name: Hofmann, Martin R.
  last_name: Hofmann
- first_name: Leon
  full_name: Zens, Leon
  last_name: Zens
- first_name: Jens
  full_name: Möller, Jens
  last_name: Möller
- first_name: Vira
  full_name: Besaga, Vira
  last_name: Besaga
citation:
  ama: 'Gerhardt NC, Hofmann MR, Zens L, Möller J, Besaga V. Quantitative holography
    for the characterisation of semiconductor amplifieres and lasers. In: <i>Practical
    Holography XXXIX: Displays, Materials, and Applications</i>. ; 2025. doi:<a href="https://doi.org/10.1117/12.3041318">10.1117/12.3041318</a>'
  apa: 'Gerhardt, N. C., Hofmann, M. R., Zens, L., Möller, J., &#38; Besaga, V. (2025).
    Quantitative holography for the characterisation of semiconductor amplifieres
    and lasers. <i>Practical Holography XXXIX: Displays, Materials, and Applications</i>.
    <a href="https://doi.org/10.1117/12.3041318">https://doi.org/10.1117/12.3041318</a>'
  bibtex: '@inproceedings{Gerhardt_Hofmann_Zens_Möller_Besaga_2025, title={Quantitative
    holography for the characterisation of semiconductor amplifieres and lasers},
    DOI={<a href="https://doi.org/10.1117/12.3041318">10.1117/12.3041318</a>}, booktitle={Practical
    Holography XXXIX: Displays, Materials, and Applications}, author={Gerhardt, Nils
    Christopher and Hofmann, Martin R. and Zens, Leon and Möller, Jens and Besaga,
    Vira}, year={2025} }'
  chicago: 'Gerhardt, Nils Christopher, Martin R. Hofmann, Leon Zens, Jens Möller,
    and Vira Besaga. “Quantitative Holography for the Characterisation of Semiconductor
    Amplifieres and Lasers.” In <i>Practical Holography XXXIX: Displays, Materials,
    and Applications</i>, 2025. <a href="https://doi.org/10.1117/12.3041318">https://doi.org/10.1117/12.3041318</a>.'
  ieee: 'N. C. Gerhardt, M. R. Hofmann, L. Zens, J. Möller, and V. Besaga, “Quantitative
    holography for the characterisation of semiconductor amplifieres and lasers,”
    2025, doi: <a href="https://doi.org/10.1117/12.3041318">10.1117/12.3041318</a>.'
  mla: 'Gerhardt, Nils Christopher, et al. “Quantitative Holography for the Characterisation
    of Semiconductor Amplifieres and Lasers.” <i>Practical Holography XXXIX: Displays,
    Materials, and Applications</i>, 2025, doi:<a href="https://doi.org/10.1117/12.3041318">10.1117/12.3041318</a>.'
  short: 'N.C. Gerhardt, M.R. Hofmann, L. Zens, J. Möller, V. Besaga, in: Practical
    Holography XXXIX: Displays, Materials, and Applications, 2025.'
date_created: 2026-02-20T10:03:50Z
date_updated: 2026-02-25T09:34:37Z
department:
- _id: '977'
doi: 10.1117/12.3041318
language:
- iso: eng
publication: 'Practical Holography XXXIX: Displays, Materials, and Applications'
status: public
title: Quantitative holography for the characterisation of semiconductor amplifieres
  and lasers
type: conference
user_id: '15911'
year: '2025'
...
---
_id: '64292'
author:
- first_name: M.
  full_name: Lindemann, M.
  last_name: Lindemann
- first_name: M.
  full_name: D’Alessandro, M.
  last_name: D’Alessandro
- first_name: N.
  full_name: Ledentsov, N.
  last_name: Ledentsov
- first_name: O. Y.
  full_name: Makarov, O. Y.
  last_name: Makarov
- first_name: N. N.
  full_name: Ledentsov, N. N.
  last_name: Ledentsov
- first_name: A.
  full_name: Tibaldi, A.
  last_name: Tibaldi
- first_name: N. C.
  full_name: Gerhardt, N. C.
  last_name: Gerhardt
- first_name: M. R.
  full_name: Hofmann, M. R.
  last_name: Hofmann
citation:
  ama: Lindemann M, D’Alessandro M, Ledentsov N, et al. Laterally coupled vertical-cavity
    surface-emitting lasers with tunable resonance width and frequency. <i>Journal
    of Applied Physics</i>. 2025;138(5). doi:<a href="https://doi.org/10.1063/5.0275622">10.1063/5.0275622</a>
  apa: Lindemann, M., D’Alessandro, M., Ledentsov, N., Makarov, O. Y., Ledentsov,
    N. N., Tibaldi, A., Gerhardt, N. C., &#38; Hofmann, M. R. (2025). Laterally coupled
    vertical-cavity surface-emitting lasers with tunable resonance width and frequency.
    <i>Journal of Applied Physics</i>, <i>138</i>(5). <a href="https://doi.org/10.1063/5.0275622">https://doi.org/10.1063/5.0275622</a>
  bibtex: '@article{Lindemann_D’Alessandro_Ledentsov_Makarov_Ledentsov_Tibaldi_Gerhardt_Hofmann_2025,
    title={Laterally coupled vertical-cavity surface-emitting lasers with tunable
    resonance width and frequency}, volume={138}, DOI={<a href="https://doi.org/10.1063/5.0275622">10.1063/5.0275622</a>},
    number={5}, journal={Journal of Applied Physics}, publisher={AIP Publishing},
    author={Lindemann, M. and D’Alessandro, M. and Ledentsov, N. and Makarov, O. Y.
    and Ledentsov, N. N. and Tibaldi, A. and Gerhardt, N. C. and Hofmann, M. R.},
    year={2025} }'
  chicago: Lindemann, M., M. D’Alessandro, N. Ledentsov, O. Y. Makarov, N. N. Ledentsov,
    A. Tibaldi, N. C. Gerhardt, and M. R. Hofmann. “Laterally Coupled Vertical-Cavity
    Surface-Emitting Lasers with Tunable Resonance Width and Frequency.” <i>Journal
    of Applied Physics</i> 138, no. 5 (2025). <a href="https://doi.org/10.1063/5.0275622">https://doi.org/10.1063/5.0275622</a>.
  ieee: 'M. Lindemann <i>et al.</i>, “Laterally coupled vertical-cavity surface-emitting
    lasers with tunable resonance width and frequency,” <i>Journal of Applied Physics</i>,
    vol. 138, no. 5, 2025, doi: <a href="https://doi.org/10.1063/5.0275622">10.1063/5.0275622</a>.'
  mla: Lindemann, M., et al. “Laterally Coupled Vertical-Cavity Surface-Emitting Lasers
    with Tunable Resonance Width and Frequency.” <i>Journal of Applied Physics</i>,
    vol. 138, no. 5, AIP Publishing, 2025, doi:<a href="https://doi.org/10.1063/5.0275622">10.1063/5.0275622</a>.
  short: M. Lindemann, M. D’Alessandro, N. Ledentsov, O.Y. Makarov, N.N. Ledentsov,
    A. Tibaldi, N.C. Gerhardt, M.R. Hofmann, Journal of Applied Physics 138 (2025).
date_created: 2026-02-20T10:03:50Z
date_updated: 2026-02-25T13:59:32Z
department:
- _id: '977'
doi: 10.1063/5.0275622
intvolume: '       138'
issue: '5'
publication: Journal of Applied Physics
publication_identifier:
  issn:
  - 1089-7550
publisher: AIP Publishing
status: public
title: Laterally coupled vertical-cavity surface-emitting lasers with tunable resonance
  width and frequency
type: journal_article
user_id: '15911'
volume: 138
year: '2025'
...
---
_id: '64550'
author:
- first_name: Leon
  full_name: Zens, Leon
  last_name: Zens
- first_name: Vira
  full_name: Besaga, Vira
  last_name: Besaga
- first_name: Jens
  full_name: Möller, Jens
  last_name: Möller
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin
  full_name: Hofmann, Martin
  last_name: Hofmann
citation:
  ama: Zens L, Besaga V, Möller J, Gerhardt NC, Hofmann M. Holographic measurement
    of gain and linewidth enhancement factor in semiconductor waveguides. <i>Optics
    Express</i>. Published online 2024. doi:<a href="https://doi.org/10.1364/oe.538741">10.1364/oe.538741</a>
  apa: Zens, L., Besaga, V., Möller, J., Gerhardt, N. C., &#38; Hofmann, M. (2024).
    Holographic measurement of gain and linewidth enhancement factor in semiconductor
    waveguides. <i>Optics Express</i>. <a href="https://doi.org/10.1364/oe.538741">https://doi.org/10.1364/oe.538741</a>
  bibtex: '@article{Zens_Besaga_Möller_Gerhardt_Hofmann_2024, title={Holographic measurement
    of gain and linewidth enhancement factor in semiconductor waveguides}, DOI={<a
    href="https://doi.org/10.1364/oe.538741">10.1364/oe.538741</a>}, journal={Optics
    Express}, publisher={Optica Publishing Group}, author={Zens, Leon and Besaga,
    Vira and Möller, Jens and Gerhardt, Nils Christopher and Hofmann, Martin}, year={2024}
    }'
  chicago: Zens, Leon, Vira Besaga, Jens Möller, Nils Christopher Gerhardt, and Martin
    Hofmann. “Holographic Measurement of Gain and Linewidth Enhancement Factor in
    Semiconductor Waveguides.” <i>Optics Express</i>, 2024. <a href="https://doi.org/10.1364/oe.538741">https://doi.org/10.1364/oe.538741</a>.
  ieee: 'L. Zens, V. Besaga, J. Möller, N. C. Gerhardt, and M. Hofmann, “Holographic
    measurement of gain and linewidth enhancement factor in semiconductor waveguides,”
    <i>Optics Express</i>, 2024, doi: <a href="https://doi.org/10.1364/oe.538741">10.1364/oe.538741</a>.'
  mla: Zens, Leon, et al. “Holographic Measurement of Gain and Linewidth Enhancement
    Factor in Semiconductor Waveguides.” <i>Optics Express</i>, Optica Publishing
    Group, 2024, doi:<a href="https://doi.org/10.1364/oe.538741">10.1364/oe.538741</a>.
  short: L. Zens, V. Besaga, J. Möller, N.C. Gerhardt, M. Hofmann, Optics Express
    (2024).
date_created: 2026-02-20T11:10:34Z
date_updated: 2026-02-20T11:14:32Z
department:
- _id: '977'
doi: 10.1364/oe.538741
language:
- iso: eng
publication: Optics Express
publication_identifier:
  issn:
  - 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Holographic measurement of gain and linewidth enhancement factor in semiconductor
  waveguides
type: journal_article
user_id: '15911'
year: '2024'
...
---
_id: '64585'
author:
- first_name: Markus
  full_name: Lindemann, Markus
  last_name: Lindemann
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Pambiang Abel
  full_name: Dainone, Pambiang Abel
  last_name: Dainone
- first_name: Pierre
  full_name: Renucci, Pierre
  last_name: Renucci
- first_name: Alexandre
  full_name: Bouché, Alexandre
  last_name: Bouché
- first_name: Martina
  full_name: Morassi, Martina
  last_name: Morassi
- first_name: Xavier
  full_name: Devaux, Xavier
  last_name: Devaux
- first_name: Jean-Marie
  full_name: George, Jean-Marie
  last_name: George
- first_name: Henri
  full_name: Jaffrès, Henri
  last_name: Jaffrès
- first_name: Aristide
  full_name: Lemaitre, Aristide
  last_name: Lemaitre
- first_name: Bo
  full_name: Xu, Bo
  last_name: Xu
- first_name: Mathieu
  full_name: Stoffel, Mathieu
  last_name: Stoffel
- first_name: Tongxin
  full_name: Chen, Tongxin
  last_name: Chen
- first_name: Laurent
  full_name: Lombez, Laurent
  last_name: Lombez
- first_name: Delphine
  full_name: Lagarde, Delphine
  last_name: Lagarde
- first_name: Guangwei
  full_name: Cong, Guangwei
  last_name: Cong
- first_name: Tianyi
  full_name: Ma, Tianyi
  last_name: Ma
- first_name: Philippe
  full_name: Pigeat, Philippe
  last_name: Pigeat
- first_name: Michel
  full_name: Vergnat, Michel
  last_name: Vergnat
- first_name: Hervé
  full_name: Rinnert, Hervé
  last_name: Rinnert
- first_name: Xavier
  full_name: Marie, Xavier
  last_name: Marie
- first_name: Xiufeng
  full_name: Han, Xiufeng
  last_name: Han
- first_name: Stephane
  full_name: Mangin, Stephane
  last_name: Mangin
- first_name: Juan-Carlos
  full_name: Rojas-Sánchez, Juan-Carlos
  last_name: Rojas-Sánchez
- first_name: Jian-Ping
  full_name: Wang, Jian-Ping
  last_name: Wang
- first_name: Matthew C.
  full_name: Beard, Matthew C.
  last_name: Beard
- first_name: Igor
  full_name: Žutić, Igor
  last_name: Žutić
- first_name: Nicholas
  full_name: Figueiredo Prestes, Nicholas
  last_name: Figueiredo Prestes
- first_name: Yuan
  full_name: Lu, Yuan
  last_name: Lu
citation:
  ama: Lindemann M, Gerhardt NC, Dainone PA, et al. Controlling the helicity of light
    by electrical magnetization switching. <i>Nature</i>. 2024;627(8005):783-788.
    doi:<a href="https://doi.org/10.1038/s41586-024-07125-5">10.1038/s41586-024-07125-5</a>
  apa: Lindemann, M., Gerhardt, N. C., Dainone, P. A., Renucci, P., Bouché, A., Morassi,
    M., Devaux, X., George, J.-M., Jaffrès, H., Lemaitre, A., Xu, B., Stoffel, M.,
    Chen, T., Lombez, L., Lagarde, D., Cong, G., Ma, T., Pigeat, P., Vergnat, M.,
    … Lu, Y. (2024). Controlling the helicity of light by electrical magnetization
    switching. <i>Nature</i>, <i>627</i>(8005), 783–788. <a href="https://doi.org/10.1038/s41586-024-07125-5">https://doi.org/10.1038/s41586-024-07125-5</a>
  bibtex: '@article{Lindemann_Gerhardt_Dainone_Renucci_Bouché_Morassi_Devaux_George_Jaffrès_Lemaitre_et
    al._2024, title={Controlling the helicity of light by electrical magnetization
    switching}, volume={627}, DOI={<a href="https://doi.org/10.1038/s41586-024-07125-5">10.1038/s41586-024-07125-5</a>},
    number={8005}, journal={Nature}, author={Lindemann, Markus and Gerhardt, Nils
    Christopher and Dainone, Pambiang Abel and Renucci, Pierre and Bouché, Alexandre
    and Morassi, Martina and Devaux, Xavier and George, Jean-Marie and Jaffrès, Henri
    and Lemaitre, Aristide and et al.}, year={2024}, pages={783–788} }'
  chicago: 'Lindemann, Markus, Nils Christopher Gerhardt, Pambiang Abel Dainone, Pierre
    Renucci, Alexandre Bouché, Martina Morassi, Xavier Devaux, et al. “Controlling
    the Helicity of Light by Electrical Magnetization Switching.” <i>Nature</i> 627,
    no. 8005 (2024): 783–88. <a href="https://doi.org/10.1038/s41586-024-07125-5">https://doi.org/10.1038/s41586-024-07125-5</a>.'
  ieee: 'M. Lindemann <i>et al.</i>, “Controlling the helicity of light by electrical
    magnetization switching,” <i>Nature</i>, vol. 627, no. 8005, pp. 783–788, 2024,
    doi: <a href="https://doi.org/10.1038/s41586-024-07125-5">10.1038/s41586-024-07125-5</a>.'
  mla: Lindemann, Markus, et al. “Controlling the Helicity of Light by Electrical
    Magnetization Switching.” <i>Nature</i>, vol. 627, no. 8005, 2024, pp. 783–88,
    doi:<a href="https://doi.org/10.1038/s41586-024-07125-5">10.1038/s41586-024-07125-5</a>.
  short: M. Lindemann, N.C. Gerhardt, P.A. Dainone, P. Renucci, A. Bouché, M. Morassi,
    X. Devaux, J.-M. George, H. Jaffrès, A. Lemaitre, B. Xu, M. Stoffel, T. Chen,
    L. Lombez, D. Lagarde, G. Cong, T. Ma, P. Pigeat, M. Vergnat, H. Rinnert, X. Marie,
    X. Han, S. Mangin, J.-C. Rojas-Sánchez, J.-P. Wang, M.C. Beard, I. Žutić, N. Figueiredo
    Prestes, Y. Lu, Nature 627 (2024) 783–788.
date_created: 2026-02-23T10:06:13Z
date_updated: 2026-02-23T13:10:16Z
department:
- _id: '977'
doi: 10.1038/s41586-024-07125-5
intvolume: '       627'
issue: '8005'
language:
- iso: eng
page: 783 - 788
publication: Nature
status: public
title: Controlling the helicity of light by electrical magnetization switching
type: journal_article
user_id: '15911'
volume: 627
year: '2024'
...
---
_id: '64549'
author:
- first_name: Leon
  full_name: Zens, Leon
  last_name: Zens
- first_name: Vira
  full_name: Besaga, Vira
  last_name: Besaga
- first_name: Jens
  full_name: Möller, Jens
  last_name: Möller
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin
  full_name: Hofmann, Martin
  last_name: Hofmann
citation:
  ama: Zens L, Besaga V, Möller J, Gerhardt NC, Hofmann M. Holographic measurement
    of gain and linewidth enhancement factor in semiconductor waveguides. <i>Optics
    Express</i>. Published online 2024. doi:<a href="https://doi.org/10.1364/oe.538741">10.1364/oe.538741</a>
  apa: Zens, L., Besaga, V., Möller, J., Gerhardt, N. C., &#38; Hofmann, M. (2024).
    Holographic measurement of gain and linewidth enhancement factor in semiconductor
    waveguides. <i>Optics Express</i>. <a href="https://doi.org/10.1364/oe.538741">https://doi.org/10.1364/oe.538741</a>
  bibtex: '@article{Zens_Besaga_Möller_Gerhardt_Hofmann_2024, title={Holographic measurement
    of gain and linewidth enhancement factor in semiconductor waveguides}, DOI={<a
    href="https://doi.org/10.1364/oe.538741">10.1364/oe.538741</a>}, journal={Optics
    Express}, publisher={Optica Publishing Group}, author={Zens, Leon and Besaga,
    Vira and Möller, Jens and Gerhardt, Nils Christopher and Hofmann, Martin}, year={2024}
    }'
  chicago: Zens, Leon, Vira Besaga, Jens Möller, Nils Christopher Gerhardt, and Martin
    Hofmann. “Holographic Measurement of Gain and Linewidth Enhancement Factor in
    Semiconductor Waveguides.” <i>Optics Express</i>, 2024. <a href="https://doi.org/10.1364/oe.538741">https://doi.org/10.1364/oe.538741</a>.
  ieee: 'L. Zens, V. Besaga, J. Möller, N. C. Gerhardt, and M. Hofmann, “Holographic
    measurement of gain and linewidth enhancement factor in semiconductor waveguides,”
    <i>Optics Express</i>, 2024, doi: <a href="https://doi.org/10.1364/oe.538741">10.1364/oe.538741</a>.'
  mla: Zens, Leon, et al. “Holographic Measurement of Gain and Linewidth Enhancement
    Factor in Semiconductor Waveguides.” <i>Optics Express</i>, Optica Publishing
    Group, 2024, doi:<a href="https://doi.org/10.1364/oe.538741">10.1364/oe.538741</a>.
  short: L. Zens, V. Besaga, J. Möller, N.C. Gerhardt, M. Hofmann, Optics Express
    (2024).
date_created: 2026-02-20T11:09:40Z
date_updated: 2026-02-23T13:06:50Z
department:
- _id: '977'
doi: 10.1364/oe.538741
language:
- iso: eng
publication: Optics Express
publication_identifier:
  issn:
  - 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Holographic measurement of gain and linewidth enhancement factor in semiconductor
  waveguides
type: journal_article
user_id: '15911'
year: '2024'
...
---
_id: '59704'
author:
- first_name: Geoffrey Mark
  full_name: Kagarura, Geoffrey Mark
  id: '88623'
  last_name: Kagarura
- first_name: Ulrich
  full_name: Hilleringmann, Ulrich
  id: '20179'
  last_name: Hilleringmann
- first_name: Dmitry
  full_name: Petrov, Dmitry
  id: '8282'
  last_name: Petrov
citation:
  ama: 'Kagarura GM, Hilleringmann U, Petrov D. A low cost weather monitoring, PV
    and prediction system in East Africa. In: <i>2023 IEEE International Conferences
    on Internet of Things (IThings) and IEEE Green Computing &#38;amp;Amp; Communications
    (GreenCom) and IEEE Cyber, Physical &#38;amp;Amp; Social Computing (CPSCom) and
    IEEE Smart Data (SmartData) and IEEE Congress on Cybermatics (Cybermatics)</i>.
    IEEE; 2024. doi:<a href="https://doi.org/10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130">10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130</a>'
  apa: Kagarura, G. M., Hilleringmann, U., &#38; Petrov, D. (2024). A low cost weather
    monitoring, PV and prediction system in East Africa. <i>2023 IEEE International
    Conferences on Internet of Things (IThings) and IEEE Green Computing &#38;amp;Amp;
    Communications (GreenCom) and IEEE Cyber, Physical &#38;amp;Amp; Social Computing
    (CPSCom) and IEEE Smart Data (SmartData) and IEEE Congress on Cybermatics (Cybermatics)</i>.
    <a href="https://doi.org/10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130">https://doi.org/10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130</a>
  bibtex: '@inproceedings{Kagarura_Hilleringmann_Petrov_2024, title={A low cost weather
    monitoring, PV and prediction system in East Africa}, DOI={<a href="https://doi.org/10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130">10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130</a>},
    booktitle={2023 IEEE International Conferences on Internet of Things (iThings)
    and IEEE Green Computing &#38;amp;amp; Communications (GreenCom) and IEEE Cyber,
    Physical &#38;amp;amp; Social Computing (CPSCom) and IEEE Smart Data (SmartData)
    and IEEE Congress on Cybermatics (Cybermatics)}, publisher={IEEE}, author={Kagarura,
    Geoffrey Mark and Hilleringmann, Ulrich and Petrov, Dmitry}, year={2024} }'
  chicago: Kagarura, Geoffrey Mark, Ulrich Hilleringmann, and Dmitry Petrov. “A Low
    Cost Weather Monitoring, PV and Prediction System in East Africa.” In <i>2023
    IEEE International Conferences on Internet of Things (IThings) and IEEE Green
    Computing &#38;amp;Amp; Communications (GreenCom) and IEEE Cyber, Physical &#38;amp;Amp;
    Social Computing (CPSCom) and IEEE Smart Data (SmartData) and IEEE Congress on
    Cybermatics (Cybermatics)</i>. IEEE, 2024. <a href="https://doi.org/10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130">https://doi.org/10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130</a>.
  ieee: 'G. M. Kagarura, U. Hilleringmann, and D. Petrov, “A low cost weather monitoring,
    PV and prediction system in East Africa,” 2024, doi: <a href="https://doi.org/10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130">10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130</a>.'
  mla: Kagarura, Geoffrey Mark, et al. “A Low Cost Weather Monitoring, PV and Prediction
    System in East Africa.” <i>2023 IEEE International Conferences on Internet of
    Things (IThings) and IEEE Green Computing &#38;amp;Amp; Communications (GreenCom)
    and IEEE Cyber, Physical &#38;amp;Amp; Social Computing (CPSCom) and IEEE Smart
    Data (SmartData) and IEEE Congress on Cybermatics (Cybermatics)</i>, IEEE, 2024,
    doi:<a href="https://doi.org/10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130">10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130</a>.
  short: 'G.M. Kagarura, U. Hilleringmann, D. Petrov, in: 2023 IEEE International
    Conferences on Internet of Things (IThings) and IEEE Green Computing &#38;amp;Amp;
    Communications (GreenCom) and IEEE Cyber, Physical &#38;amp;Amp; Social Computing
    (CPSCom) and IEEE Smart Data (SmartData) and IEEE Congress on Cybermatics (Cybermatics),
    IEEE, 2024.'
date_created: 2025-04-29T06:47:18Z
date_updated: 2026-02-24T19:17:12Z
department:
- _id: '59'
- _id: '977'
doi: 10.1109/ithings-greencom-cpscom-smartdata-cybermatics60724.2023.00130
language:
- iso: eng
publication: 2023 IEEE International Conferences on Internet of Things (iThings) and
  IEEE Green Computing &amp;amp; Communications (GreenCom) and IEEE Cyber, Physical
  &amp;amp; Social Computing (CPSCom) and IEEE Smart Data (SmartData) and IEEE Congress
  on Cybermatics (Cybermatics)
publication_status: published
publisher: IEEE
status: public
title: A low cost weather monitoring, PV and prediction system in East Africa
type: conference
user_id: '8282'
year: '2024'
...
---
_id: '64296'
author:
- first_name: Markus
  full_name: Lindemann, Markus
  last_name: Lindemann
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin R.
  full_name: Hofmann, Martin R.
  last_name: Hofmann
- first_name: N. N.
  full_name: Ledentsov, N. N.
  last_name: Ledentsov
- first_name: V. A.
  full_name: Shchukin, V. A.
  last_name: Shchukin
- first_name: O. Y.
  full_name: Makarov, O. Y.
  last_name: Makarov
- first_name: V.
  full_name: Zerova, V.
  last_name: Zerova
- first_name: M.
  full_name: D’alessandro, M.
  last_name: D’alessandro
- first_name: A.
  full_name: Tibaldi, A.
  last_name: Tibaldi
- first_name: J. P.
  full_name: Turkiewicz, J. P.
  last_name: Turkiewicz
citation:
  ama: 'Lindemann M, Gerhardt NC, Hofmann MR, et al. Study of Electrically Excited
    Photon-Photon Resonances in Self-Injection-Locked Coupled-Cavity VCSELs. In: <i>2024
    IEEE 29th International Semiconductor Laser Conference (ISLC)</i>. ; 2024. doi:<a
    href="https://doi.org/10.1109/islc57752.2024.10717381">10.1109/islc57752.2024.10717381</a>'
  apa: Lindemann, M., Gerhardt, N. C., Hofmann, M. R., Ledentsov, N. N., Shchukin,
    V. A., Makarov, O. Y., Zerova, V., D’alessandro, M., Tibaldi, A., &#38; Turkiewicz,
    J. P. (2024). Study of Electrically Excited Photon-Photon Resonances in Self-Injection-Locked
    Coupled-Cavity VCSELs. <i>2024 IEEE 29th International Semiconductor Laser Conference
    (ISLC)</i>. <a href="https://doi.org/10.1109/islc57752.2024.10717381">https://doi.org/10.1109/islc57752.2024.10717381</a>
  bibtex: '@inproceedings{Lindemann_Gerhardt_Hofmann_Ledentsov_Shchukin_Makarov_Zerova_D’alessandro_Tibaldi_Turkiewicz_2024,
    title={Study of Electrically Excited Photon-Photon Resonances in Self-Injection-Locked
    Coupled-Cavity VCSELs}, DOI={<a href="https://doi.org/10.1109/islc57752.2024.10717381">10.1109/islc57752.2024.10717381</a>},
    booktitle={2024 IEEE 29th International Semiconductor Laser Conference (ISLC)},
    author={Lindemann, Markus and Gerhardt, Nils Christopher and Hofmann, Martin R.
    and Ledentsov, N. N. and Shchukin, V. A. and Makarov, O. Y. and Zerova, V. and
    D’alessandro, M. and Tibaldi, A. and Turkiewicz, J. P.}, year={2024} }'
  chicago: Lindemann, Markus, Nils Christopher Gerhardt, Martin R. Hofmann, N. N.
    Ledentsov, V. A. Shchukin, O. Y. Makarov, V. Zerova, M. D’alessandro, A. Tibaldi,
    and J. P. Turkiewicz. “Study of Electrically Excited Photon-Photon Resonances
    in Self-Injection-Locked Coupled-Cavity VCSELs.” In <i>2024 IEEE 29th International
    Semiconductor Laser Conference (ISLC)</i>, 2024. <a href="https://doi.org/10.1109/islc57752.2024.10717381">https://doi.org/10.1109/islc57752.2024.10717381</a>.
  ieee: 'M. Lindemann <i>et al.</i>, “Study of Electrically Excited Photon-Photon
    Resonances in Self-Injection-Locked Coupled-Cavity VCSELs,” 2024, doi: <a href="https://doi.org/10.1109/islc57752.2024.10717381">10.1109/islc57752.2024.10717381</a>.'
  mla: Lindemann, Markus, et al. “Study of Electrically Excited Photon-Photon Resonances
    in Self-Injection-Locked Coupled-Cavity VCSELs.” <i>2024 IEEE 29th International
    Semiconductor Laser Conference (ISLC)</i>, 2024, doi:<a href="https://doi.org/10.1109/islc57752.2024.10717381">10.1109/islc57752.2024.10717381</a>.
  short: 'M. Lindemann, N.C. Gerhardt, M.R. Hofmann, N.N. Ledentsov, V.A. Shchukin,
    O.Y. Makarov, V. Zerova, M. D’alessandro, A. Tibaldi, J.P. Turkiewicz, in: 2024
    IEEE 29th International Semiconductor Laser Conference (ISLC), 2024.'
date_created: 2026-02-20T10:03:50Z
date_updated: 2026-02-25T14:00:00Z
department:
- _id: '977'
doi: 10.1109/islc57752.2024.10717381
language:
- iso: eng
publication: 2024 IEEE 29th International Semiconductor Laser Conference (ISLC)
status: public
title: Study of Electrically Excited Photon-Photon Resonances in Self-Injection-Locked
  Coupled-Cavity VCSELs
type: conference
user_id: '15911'
year: '2024'
...
---
_id: '64295'
author:
- first_name: Leon
  full_name: Zens, Leon
  last_name: Zens
- first_name: Vira
  full_name: Besaga, Vira
  last_name: Besaga
- first_name: Jens
  full_name: Möller, Jens
  last_name: Möller
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin R.
  full_name: Hofmann, Martin R.
  last_name: Hofmann
citation:
  ama: Zens L, Besaga V, Möller J, Gerhardt NC, Hofmann MR. Holographic measurement
    of gain and linewidth enhancement factor in semiconductor waveguides. <i>Optics
    express</i>. 2024;33(1):34-49. doi:<a href="https://doi.org/10.1364/oe.538741">10.1364/oe.538741</a>
  apa: Zens, L., Besaga, V., Möller, J., Gerhardt, N. C., &#38; Hofmann, M. R. (2024).
    Holographic measurement of gain and linewidth enhancement factor in semiconductor
    waveguides. <i>Optics Express</i>, <i>33</i>(1), 34–49. <a href="https://doi.org/10.1364/oe.538741">https://doi.org/10.1364/oe.538741</a>
  bibtex: '@article{Zens_Besaga_Möller_Gerhardt_Hofmann_2024, title={Holographic measurement
    of gain and linewidth enhancement factor in semiconductor waveguides}, volume={33},
    DOI={<a href="https://doi.org/10.1364/oe.538741">10.1364/oe.538741</a>}, number={1},
    journal={Optics express}, author={Zens, Leon and Besaga, Vira and Möller, Jens
    and Gerhardt, Nils Christopher and Hofmann, Martin R.}, year={2024}, pages={34–49}
    }'
  chicago: 'Zens, Leon, Vira Besaga, Jens Möller, Nils Christopher Gerhardt, and Martin
    R. Hofmann. “Holographic Measurement of Gain and Linewidth Enhancement Factor
    in Semiconductor Waveguides.” <i>Optics Express</i> 33, no. 1 (2024): 34–49. <a
    href="https://doi.org/10.1364/oe.538741">https://doi.org/10.1364/oe.538741</a>.'
  ieee: 'L. Zens, V. Besaga, J. Möller, N. C. Gerhardt, and M. R. Hofmann, “Holographic
    measurement of gain and linewidth enhancement factor in semiconductor waveguides,”
    <i>Optics express</i>, vol. 33, no. 1, pp. 34–49, 2024, doi: <a href="https://doi.org/10.1364/oe.538741">10.1364/oe.538741</a>.'
  mla: Zens, Leon, et al. “Holographic Measurement of Gain and Linewidth Enhancement
    Factor in Semiconductor Waveguides.” <i>Optics Express</i>, vol. 33, no. 1, 2024,
    pp. 34–49, doi:<a href="https://doi.org/10.1364/oe.538741">10.1364/oe.538741</a>.
  short: L. Zens, V. Besaga, J. Möller, N.C. Gerhardt, M.R. Hofmann, Optics Express
    33 (2024) 34–49.
date_created: 2026-02-20T10:03:50Z
date_updated: 2026-02-25T14:00:34Z
department:
- _id: '977'
doi: 10.1364/oe.538741
intvolume: '        33'
issue: '1'
language:
- iso: eng
page: 34 - 49
publication: Optics express
status: public
title: Holographic measurement of gain and linewidth enhancement factor in semiconductor
  waveguides
type: journal_article
user_id: '15911'
volume: 33
year: '2024'
...
---
_id: '59663'
abstract:
- lang: eng
  text: Controlling the intensity of emitted light and charge current is the basis
    of transferring and processing information1. By contrast, robust information storage
    and magnetic random-access memories are implemented using the spin of the carrier
    and the associated magnetization in ferromagnets2. The missing link between the
    respective disciplines of photonics, electronics and spintronics is to modulate
    the circular polarization of the emitted light, rather than its intensity, by
    electrically controlled magnetization. Here we demonstrate that this missing link
    is established at room temperature and zero applied magnetic field in light-emitting
    diodes2,3,4,5,6,7, through the transfer of angular momentum between photons, electrons
    and ferromagnets. With spin–orbit torque8,9,10,11, a charge current generates
    also a spin current to electrically switch the magnetization. This switching determines
    the spin orientation of injected carriers into semiconductors, in which the transfer
    of angular momentum from the electron spin to photon controls the circular polarization
    of the emitted light2. The spin–photon conversion with the nonvolatile control
    of magnetization opens paths to seamlessly integrate information transfer, processing
    and storage. Our results provide substantial advances towards electrically controlled
    ultrafast modulation of circular polarization and spin injection with magnetization
    dynamics for the next-generation information and communication technology12, including
    space–light data transfer. The same operating principle in scaled-down structures
    or using two-dimensional materials will enable transformative opportunities for
    quantum information processing with spin-controlled single-photon sources, as
    well as for implementing spin-dependent time-resolved spectroscopies.
article_type: original
author:
- first_name: Pambiang Abel
  full_name: Dainone, Pambiang Abel
  last_name: Dainone
- first_name: Nicholas Figueiredo
  full_name: Prestes, Nicholas Figueiredo
  last_name: Prestes
- first_name: Pierre
  full_name: Renucci, Pierre
  last_name: Renucci
- first_name: Alexandre
  full_name: Bouché, Alexandre
  last_name: Bouché
- first_name: Martina
  full_name: Morassi, Martina
  last_name: Morassi
- first_name: Xavier
  full_name: Devaux, Xavier
  last_name: Devaux
- first_name: Markus
  full_name: Lindemann, Markus
  last_name: Lindemann
- first_name: Jean-Marie
  full_name: George, Jean-Marie
  last_name: George
- first_name: Henri
  full_name: Jaffrès, Henri
  last_name: Jaffrès
- first_name: Aristide
  full_name: Lemaitre, Aristide
  last_name: Lemaitre
- first_name: Bo
  full_name: Xu, Bo
  last_name: Xu
- first_name: Mathieu
  full_name: Stoffel, Mathieu
  last_name: Stoffel
- first_name: Tongxin
  full_name: Chen, Tongxin
  last_name: Chen
- first_name: Laurent
  full_name: Lombez, Laurent
  last_name: Lombez
- first_name: Delphine
  full_name: Lagarde, Delphine
  last_name: Lagarde
- first_name: Guangwei
  full_name: Cong, Guangwei
  last_name: Cong
- first_name: Tianyi
  full_name: Ma, Tianyi
  last_name: Ma
- first_name: Philippe
  full_name: Pigeat, Philippe
  last_name: Pigeat
- first_name: Michel
  full_name: Vergnat, Michel
  last_name: Vergnat
- first_name: Hervé
  full_name: Rinnert, Hervé
  last_name: Rinnert
- first_name: Xavier
  full_name: Marie, Xavier
  last_name: Marie
- first_name: Xiufeng
  full_name: Han, Xiufeng
  last_name: Han
- first_name: Stephane
  full_name: Mangin, Stephane
  last_name: Mangin
- first_name: Juan-Carlos
  full_name: Rojas-Sánchez, Juan-Carlos
  last_name: Rojas-Sánchez
- first_name: Jian-Ping
  full_name: Wang, Jian-Ping
  last_name: Wang
- first_name: Matthew C.
  full_name: Beard, Matthew C.
  last_name: Beard
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Igor
  full_name: Žutić, Igor
  last_name: Žutić
- first_name: Yuan
  full_name: Lu, Yuan
  last_name: Lu
citation:
  ama: Dainone PA, Prestes NF, Renucci P, et al. Controlling the helicity of light
    by electrical magnetization switching. <i>Nature</i>. 2024;627(8005):783-788.
    doi:<a href="https://doi.org/10.1038/s41586-024-07125-5">10.1038/s41586-024-07125-5</a>
  apa: Dainone, P. A., Prestes, N. F., Renucci, P., Bouché, A., Morassi, M., Devaux,
    X., Lindemann, M., George, J.-M., Jaffrès, H., Lemaitre, A., Xu, B., Stoffel,
    M., Chen, T., Lombez, L., Lagarde, D., Cong, G., Ma, T., Pigeat, P., Vergnat,
    M., … Lu, Y. (2024). Controlling the helicity of light by electrical magnetization
    switching. <i>Nature</i>, <i>627</i>(8005), 783–788. <a href="https://doi.org/10.1038/s41586-024-07125-5">https://doi.org/10.1038/s41586-024-07125-5</a>
  bibtex: '@article{Dainone_Prestes_Renucci_Bouché_Morassi_Devaux_Lindemann_George_Jaffrès_Lemaitre_et
    al._2024, title={Controlling the helicity of light by electrical magnetization
    switching}, volume={627}, DOI={<a href="https://doi.org/10.1038/s41586-024-07125-5">10.1038/s41586-024-07125-5</a>},
    number={8005}, journal={Nature}, publisher={Springer Science and Business Media
    LLC}, author={Dainone, Pambiang Abel and Prestes, Nicholas Figueiredo and Renucci,
    Pierre and Bouché, Alexandre and Morassi, Martina and Devaux, Xavier and Lindemann,
    Markus and George, Jean-Marie and Jaffrès, Henri and Lemaitre, Aristide and et
    al.}, year={2024}, pages={783–788} }'
  chicago: 'Dainone, Pambiang Abel, Nicholas Figueiredo Prestes, Pierre Renucci, Alexandre
    Bouché, Martina Morassi, Xavier Devaux, Markus Lindemann, et al. “Controlling
    the Helicity of Light by Electrical Magnetization Switching.” <i>Nature</i> 627,
    no. 8005 (2024): 783–88. <a href="https://doi.org/10.1038/s41586-024-07125-5">https://doi.org/10.1038/s41586-024-07125-5</a>.'
  ieee: 'P. A. Dainone <i>et al.</i>, “Controlling the helicity of light by electrical
    magnetization switching,” <i>Nature</i>, vol. 627, no. 8005, pp. 783–788, 2024,
    doi: <a href="https://doi.org/10.1038/s41586-024-07125-5">10.1038/s41586-024-07125-5</a>.'
  mla: Dainone, Pambiang Abel, et al. “Controlling the Helicity of Light by Electrical
    Magnetization Switching.” <i>Nature</i>, vol. 627, no. 8005, Springer Science
    and Business Media LLC, 2024, pp. 783–88, doi:<a href="https://doi.org/10.1038/s41586-024-07125-5">10.1038/s41586-024-07125-5</a>.
  short: P.A. Dainone, N.F. Prestes, P. Renucci, A. Bouché, M. Morassi, X. Devaux,
    M. Lindemann, J.-M. George, H. Jaffrès, A. Lemaitre, B. Xu, M. Stoffel, T. Chen,
    L. Lombez, D. Lagarde, G. Cong, T. Ma, P. Pigeat, M. Vergnat, H. Rinnert, X. Marie,
    X. Han, S. Mangin, J.-C. Rojas-Sánchez, J.-P. Wang, M.C. Beard, N.C. Gerhardt,
    I. Žutić, Y. Lu, Nature 627 (2024) 783–788.
date_created: 2025-04-23T13:27:27Z
date_updated: 2026-02-25T14:10:20Z
department:
- _id: '977'
doi: 10.1038/s41586-024-07125-5
extern: '1'
intvolume: '       627'
issue: '8005'
keyword:
- Lasers
- LEDs and light sources
- Spintronics
language:
- iso: eng
page: 783-788
publication: Nature
publication_identifier:
  issn:
  - 0028-0836
  - 1476-4687
publication_status: published
publisher: Springer Science and Business Media LLC
quality_controlled: '1'
status: public
title: Controlling the helicity of light by electrical magnetization switching
type: journal_article
user_id: '15911'
volume: 627
year: '2024'
...
---
_id: '64298'
author:
- first_name: Markus
  full_name: Lindemann, Markus
  last_name: Lindemann
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin R.
  full_name: Hofmann, Martin R.
  last_name: Hofmann
- first_name: N.
  full_name: Ledentsov, N.
  last_name: Ledentsov
- first_name: N. N.
  full_name: Ledentsov, N. N.
  last_name: Ledentsov
- first_name: V. A.
  full_name: Shchukin, V. A.
  last_name: Shchukin
- first_name: Ł.
  full_name: Chorchos, Ł.
  last_name: Chorchos
- first_name: O. Yu
  full_name: Makarov, O. Yu
  last_name: Makarov
- first_name: J. R.
  full_name: Kropp, J. R.
  last_name: Kropp
- first_name: I. E.
  full_name: Titkov, I. E.
  last_name: Titkov
- first_name: V. P.
  full_name: Kalosha, V. P.
  last_name: Kalosha
- first_name: V.
  full_name: Zerova, V.
  last_name: Zerova
- first_name: M.
  full_name: D’Alessandro, M.
  last_name: D’Alessandro
- first_name: V.
  full_name: Torrelli, V.
  last_name: Torrelli
- first_name: A.
  full_name: Tibaldi, A.
  last_name: Tibaldi
- first_name: P.
  full_name: Debernardi, P.
  last_name: Debernardi
citation:
  ama: 'Lindemann M, Gerhardt NC, Hofmann MR, et al. Analysis of laterally-coupled-cavity
    VCSELs for ultra-high-frequency photon-photon resonance modulation. In: <i>Vertical-Cavity
    Surface-Emitting Lasers XXVIII</i>. ; 2024. doi:<a href="https://doi.org/10.1117/12.3001177">10.1117/12.3001177</a>'
  apa: Lindemann, M., Gerhardt, N. C., Hofmann, M. R., Ledentsov, N., Ledentsov, N.
    N., Shchukin, V. A., Chorchos, Ł., Makarov, O. Y., Kropp, J. R., Titkov, I. E.,
    Kalosha, V. P., Zerova, V., D’Alessandro, M., Torrelli, V., Tibaldi, A., &#38;
    Debernardi, P. (2024). Analysis of laterally-coupled-cavity VCSELs for ultra-high-frequency
    photon-photon resonance modulation. <i>Vertical-Cavity Surface-Emitting Lasers
    XXVIII</i>. <a href="https://doi.org/10.1117/12.3001177">https://doi.org/10.1117/12.3001177</a>
  bibtex: '@inproceedings{Lindemann_Gerhardt_Hofmann_Ledentsov_Ledentsov_Shchukin_Chorchos_Makarov_Kropp_Titkov_et
    al._2024, title={Analysis of laterally-coupled-cavity VCSELs for ultra-high-frequency
    photon-photon resonance modulation}, DOI={<a href="https://doi.org/10.1117/12.3001177">10.1117/12.3001177</a>},
    booktitle={Vertical-Cavity Surface-Emitting Lasers XXVIII}, author={Lindemann,
    Markus and Gerhardt, Nils Christopher and Hofmann, Martin R. and Ledentsov, N.
    and Ledentsov, N. N. and Shchukin, V. A. and Chorchos, Ł. and Makarov, O. Yu and
    Kropp, J. R. and Titkov, I. E. and et al.}, year={2024} }'
  chicago: Lindemann, Markus, Nils Christopher Gerhardt, Martin R. Hofmann, N. Ledentsov,
    N. N. Ledentsov, V. A. Shchukin, Ł. Chorchos, et al. “Analysis of Laterally-Coupled-Cavity
    VCSELs for Ultra-High-Frequency Photon-Photon Resonance Modulation.” In <i>Vertical-Cavity
    Surface-Emitting Lasers XXVIII</i>, 2024. <a href="https://doi.org/10.1117/12.3001177">https://doi.org/10.1117/12.3001177</a>.
  ieee: 'M. Lindemann <i>et al.</i>, “Analysis of laterally-coupled-cavity VCSELs
    for ultra-high-frequency photon-photon resonance modulation,” 2024, doi: <a href="https://doi.org/10.1117/12.3001177">10.1117/12.3001177</a>.'
  mla: Lindemann, Markus, et al. “Analysis of Laterally-Coupled-Cavity VCSELs for
    Ultra-High-Frequency Photon-Photon Resonance Modulation.” <i>Vertical-Cavity Surface-Emitting
    Lasers XXVIII</i>, 2024, doi:<a href="https://doi.org/10.1117/12.3001177">10.1117/12.3001177</a>.
  short: 'M. Lindemann, N.C. Gerhardt, M.R. Hofmann, N. Ledentsov, N.N. Ledentsov,
    V.A. Shchukin, Ł. Chorchos, O.Y. Makarov, J.R. Kropp, I.E. Titkov, V.P. Kalosha,
    V. Zerova, M. D’Alessandro, V. Torrelli, A. Tibaldi, P. Debernardi, in: Vertical-Cavity
    Surface-Emitting Lasers XXVIII, 2024.'
date_created: 2026-02-20T10:03:51Z
date_updated: 2026-02-26T08:32:54Z
department:
- _id: '977'
doi: 10.1117/12.3001177
language:
- iso: eng
publication: Vertical-Cavity Surface-Emitting Lasers XXVIII
status: public
title: Analysis of laterally-coupled-cavity VCSELs for ultra-high-frequency photon-photon
  resonance modulation
type: conference
user_id: '15911'
year: '2024'
...
---
_id: '64297'
author:
- first_name: 'Markus (ORCiD: 0000-0002-2660-3497)'
  full_name: 'Lindemann, Markus (ORCiD: 0000-0002-2660-3497)'
  last_name: Lindemann
- first_name: 'Nils C. (ORCiD: 0009-0002-5538-231X)'
  full_name: 'Gerhardt, Nils C. (ORCiD: 0009-0002-5538-231X)'
  last_name: Gerhardt
- first_name: 'Martin R. (ORCiD: 0000-0003-1265-0003)'
  full_name: 'Hofmann, Martin R. (ORCiD: 0000-0003-1265-0003)'
  last_name: Hofmann
- first_name: V. A.
  full_name: Shchukin, V. A.
  last_name: Shchukin
- first_name: N. N.
  full_name: Ledentsov, N. N.
  last_name: Ledentsov
- first_name: O. Y.
  full_name: Makarov, O. Y.
  last_name: Makarov
- first_name: V.
  full_name: Zerova, V.
  last_name: Zerova
- first_name: M.
  full_name: D’Alessandro, M.
  last_name: D’Alessandro
- first_name: A.
  full_name: Tibaldi, A.
  last_name: Tibaldi
- first_name: J. P.
  full_name: Turkiewicz, J. P.
  last_name: Turkiewicz
citation:
  ama: 'Lindemann M (ORCiD: 0000-0002-2660-3497), Gerhardt NC (ORCiD: 0009-0002-5538-231X),
    Hofmann MR (ORCiD: 0000-0003-1265-0003), et al. Study of Electrically Excited
    Photon-Photon Resonances in Self-Injection-Locked Coupled-Cavity VCSELs. Published
    online 2024.'
  apa: 'Lindemann, M. (ORCiD: 0000-0002-2660-3497), Gerhardt, N. C. (ORCiD: 0009-0002-5538-231X),
    Hofmann, M. R. (ORCiD: 0000-0003-1265-0003), Shchukin, V. A., Ledentsov, N. N.,
    Makarov, O. Y., Zerova, V., D’Alessandro, M., Tibaldi, A., &#38; Turkiewicz, J.
    P. (2024). <i>Study of Electrically Excited Photon-Photon Resonances in Self-Injection-Locked
    Coupled-Cavity VCSELs</i>.'
  bibtex: '@article{Lindemann_Gerhardt_Hofmann_Shchukin_Ledentsov_Makarov_Zerova_D’Alessandro_Tibaldi_Turkiewicz_2024,
    title={Study of Electrically Excited Photon-Photon Resonances in Self-Injection-Locked
    Coupled-Cavity VCSELs}, author={Lindemann, Markus (ORCiD: 0000-0002-2660-3497)
    and Gerhardt, Nils C. (ORCiD: 0009-0002-5538-231X) and Hofmann, Martin R. (ORCiD:
    0000-0003-1265-0003) and Shchukin, V. A. and Ledentsov, N. N. and Makarov, O.
    Y. and Zerova, V. and D’Alessandro, M. and Tibaldi, A. and Turkiewicz, J. P.},
    year={2024} }'
  chicago: 'Lindemann, Markus (ORCiD: 0000-0002-2660-3497), Nils C. (ORCiD: 0009-0002-5538-231X)
    Gerhardt, Martin R. (ORCiD: 0000-0003-1265-0003) Hofmann, V. A. Shchukin, N. N.
    Ledentsov, O. Y. Makarov, V. Zerova, M. D’Alessandro, A. Tibaldi, and J. P. Turkiewicz.
    “Study of Electrically Excited Photon-Photon Resonances in Self-Injection-Locked
    Coupled-Cavity VCSELs,” 2024.'
  ieee: 'M. (ORCiD: 0000-0002-2660-3497) Lindemann <i>et al.</i>, “Study of Electrically
    Excited Photon-Photon Resonances in Self-Injection-Locked Coupled-Cavity VCSELs,”
    2024.'
  mla: 'Lindemann, Markus (ORCiD: 0000-0002-2660-3497), et al. <i>Study of Electrically
    Excited Photon-Photon Resonances in Self-Injection-Locked Coupled-Cavity VCSELs</i>.
    2024.'
  short: 'M. (ORCiD: 0000-0002-2660-3497) Lindemann, N.C. (ORCiD: 0009-0002-5538-231X)
    Gerhardt, M.R. (ORCiD: 0000-0003-1265-0003) Hofmann, V.A. Shchukin, N.N. Ledentsov,
    O.Y. Makarov, V. Zerova, M. D’Alessandro, A. Tibaldi, J.P. Turkiewicz, (2024).'
date_created: 2026-02-20T10:03:51Z
date_updated: 2026-02-26T10:09:36Z
department:
- _id: '977'
status: public
title: Study of Electrically Excited Photon-Photon Resonances in Self-Injection-Locked
  Coupled-Cavity VCSELs
type: journal_article
user_id: '15911'
year: '2024'
...
---
_id: '39359'
author:
- first_name: Ibrahim
  full_name: Mwammenywa, Ibrahim
  last_name: Mwammenywa
- first_name: Dmitry
  full_name: Petrov, Dmitry
  id: '8282'
  last_name: Petrov
- first_name: Philipp
  full_name: Holle, Philipp
  last_name: Holle
- first_name: Ulrich
  full_name: Hilleringmann, Ulrich
  id: '20179'
  last_name: Hilleringmann
citation:
  ama: 'Mwammenywa I, Petrov D, Holle P, Hilleringmann U. LoRa Transceiver for Load
    Monitoring and Control System in Microgrids. In: <i>2022 International Conference
    on Engineering and Emerging Technologies (ICEET)</i>. IEEE; 2023. doi:<a href="https://doi.org/10.1109/iceet56468.2022.10007274">10.1109/iceet56468.2022.10007274</a>'
  apa: Mwammenywa, I., Petrov, D., Holle, P., &#38; Hilleringmann, U. (2023). LoRa
    Transceiver for Load Monitoring and Control System in Microgrids. <i>2022 International
    Conference on Engineering and Emerging Technologies (ICEET)</i>. <a href="https://doi.org/10.1109/iceet56468.2022.10007274">https://doi.org/10.1109/iceet56468.2022.10007274</a>
  bibtex: '@inproceedings{Mwammenywa_Petrov_Holle_Hilleringmann_2023, title={LoRa
    Transceiver for Load Monitoring and Control System in Microgrids}, DOI={<a href="https://doi.org/10.1109/iceet56468.2022.10007274">10.1109/iceet56468.2022.10007274</a>},
    booktitle={2022 International Conference on Engineering and Emerging Technologies
    (ICEET)}, publisher={IEEE}, author={Mwammenywa, Ibrahim and Petrov, Dmitry and
    Holle, Philipp and Hilleringmann, Ulrich}, year={2023} }'
  chicago: Mwammenywa, Ibrahim, Dmitry Petrov, Philipp Holle, and Ulrich Hilleringmann.
    “LoRa Transceiver for Load Monitoring and Control System in Microgrids.” In <i>2022
    International Conference on Engineering and Emerging Technologies (ICEET)</i>.
    IEEE, 2023. <a href="https://doi.org/10.1109/iceet56468.2022.10007274">https://doi.org/10.1109/iceet56468.2022.10007274</a>.
  ieee: 'I. Mwammenywa, D. Petrov, P. Holle, and U. Hilleringmann, “LoRa Transceiver
    for Load Monitoring and Control System in Microgrids,” 2023, doi: <a href="https://doi.org/10.1109/iceet56468.2022.10007274">10.1109/iceet56468.2022.10007274</a>.'
  mla: Mwammenywa, Ibrahim, et al. “LoRa Transceiver for Load Monitoring and Control
    System in Microgrids.” <i>2022 International Conference on Engineering and Emerging
    Technologies (ICEET)</i>, IEEE, 2023, doi:<a href="https://doi.org/10.1109/iceet56468.2022.10007274">10.1109/iceet56468.2022.10007274</a>.
  short: 'I. Mwammenywa, D. Petrov, P. Holle, U. Hilleringmann, in: 2022 International
    Conference on Engineering and Emerging Technologies (ICEET), IEEE, 2023.'
date_created: 2023-01-24T09:35:34Z
date_updated: 2026-02-24T19:10:57Z
department:
- _id: '59'
- _id: '977'
doi: 10.1109/iceet56468.2022.10007274
language:
- iso: eng
publication: 2022 International Conference on Engineering and Emerging Technologies
  (ICEET)
publication_status: published
publisher: IEEE
status: public
title: LoRa Transceiver for Load Monitoring and Control System in Microgrids
type: conference
user_id: '8282'
year: '2023'
...
---
_id: '64302'
author:
- first_name: Markus
  full_name: Lindemann, Markus
  last_name: Lindemann
- first_name: Natalie
  full_name: Jung, Natalie
  last_name: Jung
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin R.
  full_name: Hofmann, Martin R.
  last_name: Hofmann
- first_name: Nicolas
  full_name: Manrique‐Nieto, Nicolas
  last_name: Manrique‐Nieto
- first_name: Tobias
  full_name: Pusch, Tobias
  last_name: Pusch
- first_name: Rainer
  full_name: Michalzik, Rainer
  last_name: Michalzik
citation:
  ama: Lindemann M, Jung N, Gerhardt NC, et al. Polarization dynamics in spin‐VCSELs
    with integrated surface grating for high birefringence splitting. <i>Electronics
    letters</i>. 2023;59(13). doi:<a href="https://doi.org/10.1049/ell2.12827">10.1049/ell2.12827</a>
  apa: Lindemann, M., Jung, N., Gerhardt, N. C., Hofmann, M. R., Manrique‐Nieto, N.,
    Pusch, T., &#38; Michalzik, R. (2023). Polarization dynamics in spin‐VCSELs with
    integrated surface grating for high birefringence splitting. <i>Electronics Letters</i>,
    <i>59</i>(13). <a href="https://doi.org/10.1049/ell2.12827">https://doi.org/10.1049/ell2.12827</a>
  bibtex: '@article{Lindemann_Jung_Gerhardt_Hofmann_Manrique‐Nieto_Pusch_Michalzik_2023,
    title={Polarization dynamics in spin‐VCSELs with integrated surface grating for
    high birefringence splitting}, volume={59}, DOI={<a href="https://doi.org/10.1049/ell2.12827">10.1049/ell2.12827</a>},
    number={13}, journal={Electronics letters}, author={Lindemann, Markus and Jung,
    Natalie and Gerhardt, Nils Christopher and Hofmann, Martin R. and Manrique‐Nieto,
    Nicolas and Pusch, Tobias and Michalzik, Rainer}, year={2023} }'
  chicago: Lindemann, Markus, Natalie Jung, Nils Christopher Gerhardt, Martin R. Hofmann,
    Nicolas Manrique‐Nieto, Tobias Pusch, and Rainer Michalzik. “Polarization Dynamics
    in Spin‐VCSELs with Integrated Surface Grating for High Birefringence Splitting.”
    <i>Electronics Letters</i> 59, no. 13 (2023). <a href="https://doi.org/10.1049/ell2.12827">https://doi.org/10.1049/ell2.12827</a>.
  ieee: 'M. Lindemann <i>et al.</i>, “Polarization dynamics in spin‐VCSELs with integrated
    surface grating for high birefringence splitting,” <i>Electronics letters</i>,
    vol. 59, no. 13, 2023, doi: <a href="https://doi.org/10.1049/ell2.12827">10.1049/ell2.12827</a>.'
  mla: Lindemann, Markus, et al. “Polarization Dynamics in Spin‐VCSELs with Integrated
    Surface Grating for High Birefringence Splitting.” <i>Electronics Letters</i>,
    vol. 59, no. 13, 2023, doi:<a href="https://doi.org/10.1049/ell2.12827">10.1049/ell2.12827</a>.
  short: M. Lindemann, N. Jung, N.C. Gerhardt, M.R. Hofmann, N. Manrique‐Nieto, T.
    Pusch, R. Michalzik, Electronics Letters 59 (2023).
date_created: 2026-02-20T10:03:51Z
date_updated: 2026-02-26T07:49:59Z
department:
- _id: '977'
doi: 10.1049/ell2.12827
intvolume: '        59'
issue: '13'
language:
- iso: eng
publication: Electronics letters
status: public
title: Polarization dynamics in spin‐VCSELs with integrated surface grating for high
  birefringence splitting
type: journal_article
user_id: '15911'
volume: 59
year: '2023'
...
---
_id: '64301'
author:
- first_name: Markus
  full_name: Lindemann, Markus
  last_name: Lindemann
- first_name: Nils C.
  full_name: Gerhardt, Nils C.
  last_name: Gerhardt
- first_name: Martin R.
  full_name: Hofmann, Martin R.
  last_name: Hofmann
- first_name: N.
  full_name: Ledentsov, N.
  last_name: Ledentsov
- first_name: V. A.
  full_name: Shchukin, V. A.
  last_name: Shchukin
- first_name: N. N.
  full_name: Ledentsov, N. N.
  last_name: Ledentsov
- first_name: O. Yu.
  full_name: Makarov, O. Yu.
  last_name: Makarov
- first_name: L.
  full_name: Chorchos, L.
  last_name: Chorchos
- first_name: J. P.
  full_name: Turkiewicz, J. P.
  last_name: Turkiewicz
citation:
  ama: 'Lindemann M, Gerhardt NC, Hofmann MR, et al. Coupled Aperture VCSELs Suitable
    for 100 GHz Intensity Modulation. In: <i>2023 23rd International Conference on
    Transparent Optical Networks (ICTON)</i>. ; 2023. doi:<a href="https://doi.org/10.1109/icton59386.2023.10207536">10.1109/icton59386.2023.10207536</a>'
  apa: Lindemann, M., Gerhardt, N. C., Hofmann, M. R., Ledentsov, N., Shchukin, V.
    A., Ledentsov, N. N., Makarov, O. Yu., Chorchos, L., &#38; Turkiewicz, J. P. (2023).
    Coupled Aperture VCSELs Suitable for 100 GHz Intensity Modulation. <i>2023 23rd
    International Conference on Transparent Optical Networks (ICTON)</i>. <a href="https://doi.org/10.1109/icton59386.2023.10207536">https://doi.org/10.1109/icton59386.2023.10207536</a>
  bibtex: '@inproceedings{Lindemann_Gerhardt_Hofmann_Ledentsov_Shchukin_Ledentsov_Makarov_Chorchos_Turkiewicz_2023,
    title={Coupled Aperture VCSELs Suitable for 100 GHz Intensity Modulation}, DOI={<a
    href="https://doi.org/10.1109/icton59386.2023.10207536">10.1109/icton59386.2023.10207536</a>},
    booktitle={2023 23rd International Conference on Transparent Optical Networks
    (ICTON)}, author={Lindemann, Markus and Gerhardt, Nils C. and Hofmann, Martin
    R. and Ledentsov, N. and Shchukin, V. A. and Ledentsov, N. N. and Makarov, O.
    Yu. and Chorchos, L. and Turkiewicz, J. P.}, year={2023} }'
  chicago: Lindemann, Markus, Nils C. Gerhardt, Martin R. Hofmann, N. Ledentsov, V.
    A. Shchukin, N. N. Ledentsov, O. Yu. Makarov, L. Chorchos, and J. P. Turkiewicz.
    “Coupled Aperture VCSELs Suitable for 100 GHz Intensity Modulation.” In <i>2023
    23rd International Conference on Transparent Optical Networks (ICTON)</i>, 2023.
    <a href="https://doi.org/10.1109/icton59386.2023.10207536">https://doi.org/10.1109/icton59386.2023.10207536</a>.
  ieee: 'M. Lindemann <i>et al.</i>, “Coupled Aperture VCSELs Suitable for 100 GHz
    Intensity Modulation,” 2023, doi: <a href="https://doi.org/10.1109/icton59386.2023.10207536">10.1109/icton59386.2023.10207536</a>.'
  mla: Lindemann, Markus, et al. “Coupled Aperture VCSELs Suitable for 100 GHz Intensity
    Modulation.” <i>2023 23rd International Conference on Transparent Optical Networks
    (ICTON)</i>, 2023, doi:<a href="https://doi.org/10.1109/icton59386.2023.10207536">10.1109/icton59386.2023.10207536</a>.
  short: 'M. Lindemann, N.C. Gerhardt, M.R. Hofmann, N. Ledentsov, V.A. Shchukin,
    N.N. Ledentsov, O.Yu. Makarov, L. Chorchos, J.P. Turkiewicz, in: 2023 23rd International
    Conference on Transparent Optical Networks (ICTON), 2023.'
date_created: 2026-02-20T10:03:51Z
date_updated: 2026-02-26T08:12:40Z
department:
- _id: '977'
doi: 10.1109/icton59386.2023.10207536
language:
- iso: eng
publication: 2023 23rd International Conference on Transparent Optical Networks (ICTON)
status: public
title: Coupled Aperture VCSELs Suitable for 100 GHz Intensity Modulation
type: conference
user_id: '15911'
year: '2023'
...
---
_id: '59668'
abstract:
- lang: eng
  text: <jats:title>Abstract</jats:title><jats:p>Spin‐controlled lasers are highly
    interesting photonic devices and have been shown to provide ultrafast polarization
    dynamics in excess of 200 GHz. In contrast to conventional semiconductor lasers
    their temporal properties are not limited by the intensity dynamics, but are governed
    primarily by the interaction of the spin dynamics with the birefringent mode splitting
    that determines the polarization oscillation frequency. Another class of modern
    semiconductor lasers are high‐<jats:italic>β</jats:italic> emitters, which benefit
    from enhanced light–matter interaction due to strong mode confinement in low‐mode‐volume
    microcavities. In such structures, the emission properties can be tailored by
    the resonator geometry to realize for instance bimodal emission behavior in slightly
    elliptical micropillar cavities. This attractive feature is utilized to demonstrate
    and explore spin‐lasing effects in bimodal high‐<jats:italic>β</jats:italic> quantum
    dot micropillar lasers. The studied microlasers with a <jats:italic>β</jats:italic>‐factor
    of 4% show spin‐laser effects with experimental polarization oscillation frequencies
    up to 15 GHz and predicted frequencies up to about 100 GHz, which are controlled
    by the ellipticity of the resonator. These results reveal appealing prospects
    for very compact, ultrafast, and energy‐efficient spin‐lasers and can pave the
    way for future purely electrically injected spin‐lasers enabled by short injection
    path lengths.</jats:p>
author:
- first_name: Niels
  full_name: Heermeier, Niels
  last_name: Heermeier
- first_name: Tobias
  full_name: Heuser, Tobias
  last_name: Heuser
- first_name: Jan
  full_name: Große, Jan
  last_name: Große
- first_name: Natalie
  full_name: Jung, Natalie
  last_name: Jung
- first_name: Arsenty
  full_name: Kaganskiy, Arsenty
  last_name: Kaganskiy
- first_name: Markus
  full_name: Lindemann, Markus
  last_name: Lindemann
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin R.
  full_name: Hofmann, Martin R.
  last_name: Hofmann
- first_name: Stephan
  full_name: Reitzenstein, Stephan
  last_name: Reitzenstein
citation:
  ama: Heermeier N, Heuser T, Große J, et al. Spin‐Lasing in Bimodal Quantum Dot Micropillar
    Cavities. <i>Laser &#38;amp; Photonics Reviews</i>. 2022;16(4). doi:<a href="https://doi.org/10.1002/lpor.202100585">10.1002/lpor.202100585</a>
  apa: Heermeier, N., Heuser, T., Große, J., Jung, N., Kaganskiy, A., Lindemann, M.,
    Gerhardt, N. C., Hofmann, M. R., &#38; Reitzenstein, S. (2022). Spin‐Lasing in
    Bimodal Quantum Dot Micropillar Cavities. <i>Laser &#38;amp; Photonics Reviews</i>,
    <i>16</i>(4). <a href="https://doi.org/10.1002/lpor.202100585">https://doi.org/10.1002/lpor.202100585</a>
  bibtex: '@article{Heermeier_Heuser_Große_Jung_Kaganskiy_Lindemann_Gerhardt_Hofmann_Reitzenstein_2022,
    title={Spin‐Lasing in Bimodal Quantum Dot Micropillar Cavities}, volume={16},
    DOI={<a href="https://doi.org/10.1002/lpor.202100585">10.1002/lpor.202100585</a>},
    number={4}, journal={Laser &#38;amp; Photonics Reviews}, publisher={Wiley}, author={Heermeier,
    Niels and Heuser, Tobias and Große, Jan and Jung, Natalie and Kaganskiy, Arsenty
    and Lindemann, Markus and Gerhardt, Nils Christopher and Hofmann, Martin R. and
    Reitzenstein, Stephan}, year={2022} }'
  chicago: Heermeier, Niels, Tobias Heuser, Jan Große, Natalie Jung, Arsenty Kaganskiy,
    Markus Lindemann, Nils Christopher Gerhardt, Martin R. Hofmann, and Stephan Reitzenstein.
    “Spin‐Lasing in Bimodal Quantum Dot Micropillar Cavities.” <i>Laser &#38;amp;
    Photonics Reviews</i> 16, no. 4 (2022). <a href="https://doi.org/10.1002/lpor.202100585">https://doi.org/10.1002/lpor.202100585</a>.
  ieee: 'N. Heermeier <i>et al.</i>, “Spin‐Lasing in Bimodal Quantum Dot Micropillar
    Cavities,” <i>Laser &#38;amp; Photonics Reviews</i>, vol. 16, no. 4, 2022, doi:
    <a href="https://doi.org/10.1002/lpor.202100585">10.1002/lpor.202100585</a>.'
  mla: Heermeier, Niels, et al. “Spin‐Lasing in Bimodal Quantum Dot Micropillar Cavities.”
    <i>Laser &#38;amp; Photonics Reviews</i>, vol. 16, no. 4, Wiley, 2022, doi:<a
    href="https://doi.org/10.1002/lpor.202100585">10.1002/lpor.202100585</a>.
  short: N. Heermeier, T. Heuser, J. Große, N. Jung, A. Kaganskiy, M. Lindemann, N.C.
    Gerhardt, M.R. Hofmann, S. Reitzenstein, Laser &#38;amp; Photonics Reviews 16
    (2022).
date_created: 2025-04-24T09:09:18Z
date_updated: 2026-02-19T14:23:16Z
department:
- _id: '977'
doi: 10.1002/lpor.202100585
intvolume: '        16'
issue: '4'
language:
- iso: eng
publication: Laser &amp; Photonics Reviews
publication_identifier:
  issn:
  - 1863-8880
  - 1863-8899
publication_status: published
publisher: Wiley
status: public
title: Spin‐Lasing in Bimodal Quantum Dot Micropillar Cavities
type: journal_article
user_id: '15911'
volume: 16
year: '2022'
...
---
_id: '59758'
author:
- first_name: Ibrahim
  full_name: Mwammenywa, Ibrahim
  last_name: Mwammenywa
- first_name: Geoffrey Mark
  full_name: Kagarura, Geoffrey Mark
  id: '88623'
  last_name: Kagarura
- first_name: Dmitry
  full_name: Petrov, Dmitry
  id: '8282'
  last_name: Petrov
- first_name: Philip
  full_name: Holle, Philip
  last_name: Holle
- first_name: Ulrich
  full_name: Hilleringmann, Ulrich
  id: '20179'
  last_name: Hilleringmann
citation:
  ama: 'Mwammenywa I, Kagarura GM, Petrov D, Holle P, Hilleringmann U. LoRa-based
    Demand-side Load Monitoring and Management System for Microgrids in Africa. In:
    <i>2021 International Conference on Electrical, Computer and Energy Technologies
    (ICECET)</i>. IEEE; 2022. doi:<a href="https://doi.org/10.1109/icecet52533.2021.9698506">10.1109/icecet52533.2021.9698506</a>'
  apa: Mwammenywa, I., Kagarura, G. M., Petrov, D., Holle, P., &#38; Hilleringmann,
    U. (2022). LoRa-based Demand-side Load Monitoring and Management System for Microgrids
    in Africa. <i>2021 International Conference on Electrical, Computer and Energy
    Technologies (ICECET)</i>. <a href="https://doi.org/10.1109/icecet52533.2021.9698506">https://doi.org/10.1109/icecet52533.2021.9698506</a>
  bibtex: '@inproceedings{Mwammenywa_Kagarura_Petrov_Holle_Hilleringmann_2022, title={LoRa-based
    Demand-side Load Monitoring and Management System for Microgrids in Africa}, DOI={<a
    href="https://doi.org/10.1109/icecet52533.2021.9698506">10.1109/icecet52533.2021.9698506</a>},
    booktitle={2021 International Conference on Electrical, Computer and Energy Technologies
    (ICECET)}, publisher={IEEE}, author={Mwammenywa, Ibrahim and Kagarura, Geoffrey
    Mark and Petrov, Dmitry and Holle, Philip and Hilleringmann, Ulrich}, year={2022}
    }'
  chicago: Mwammenywa, Ibrahim, Geoffrey Mark Kagarura, Dmitry Petrov, Philip Holle,
    and Ulrich Hilleringmann. “LoRa-Based Demand-Side Load Monitoring and Management
    System for Microgrids in Africa.” In <i>2021 International Conference on Electrical,
    Computer and Energy Technologies (ICECET)</i>. IEEE, 2022. <a href="https://doi.org/10.1109/icecet52533.2021.9698506">https://doi.org/10.1109/icecet52533.2021.9698506</a>.
  ieee: 'I. Mwammenywa, G. M. Kagarura, D. Petrov, P. Holle, and U. Hilleringmann,
    “LoRa-based Demand-side Load Monitoring and Management System for Microgrids in
    Africa,” 2022, doi: <a href="https://doi.org/10.1109/icecet52533.2021.9698506">10.1109/icecet52533.2021.9698506</a>.'
  mla: Mwammenywa, Ibrahim, et al. “LoRa-Based Demand-Side Load Monitoring and Management
    System for Microgrids in Africa.” <i>2021 International Conference on Electrical,
    Computer and Energy Technologies (ICECET)</i>, IEEE, 2022, doi:<a href="https://doi.org/10.1109/icecet52533.2021.9698506">10.1109/icecet52533.2021.9698506</a>.
  short: 'I. Mwammenywa, G.M. Kagarura, D. Petrov, P. Holle, U. Hilleringmann, in:
    2021 International Conference on Electrical, Computer and Energy Technologies
    (ICECET), IEEE, 2022.'
date_created: 2025-05-02T11:34:23Z
date_updated: 2026-02-24T19:16:42Z
department:
- _id: '59'
- _id: '977'
doi: 10.1109/icecet52533.2021.9698506
language:
- iso: eng
publication: 2021 International Conference on Electrical, Computer and Energy Technologies
  (ICECET)
publication_status: published
publisher: IEEE
status: public
title: LoRa-based Demand-side Load Monitoring and Management System for Microgrids
  in Africa
type: conference
user_id: '8282'
year: '2022'
...
---
_id: '64306'
author:
- first_name: Niels
  full_name: Heermeier, Niels
  last_name: Heermeier
- first_name: Natalie
  full_name: Jung, Natalie
  last_name: Jung
- first_name: Markus
  full_name: Lindemann, Markus
  last_name: Lindemann
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin R.
  full_name: Hofmann, Martin R.
  last_name: Hofmann
- first_name: Tobias
  full_name: Heuser, Tobias
  last_name: Heuser
- first_name: Jan
  full_name: Große, Jan
  last_name: Große
- first_name: Arsenty
  full_name: Kaganskiy, Arsenty
  last_name: Kaganskiy
- first_name: Stephan
  full_name: Reitzenstein, Stephan
  last_name: Reitzenstein
citation:
  ama: 'Heermeier N, Jung N, Lindemann M, et al. Spin lasing in high-beta bimodal
    quantum dot micropillar cavities . In: <i>Spintronics XV</i>. ; 2022. doi:<a href="https://doi.org/10.1117/12.2632687">10.1117/12.2632687</a>'
  apa: Heermeier, N., Jung, N., Lindemann, M., Gerhardt, N. C., Hofmann, M. R., Heuser,
    T., Große, J., Kaganskiy, A., &#38; Reitzenstein, S. (2022). Spin lasing in high-beta
    bimodal quantum dot micropillar cavities . <i>Spintronics XV</i>. <a href="https://doi.org/10.1117/12.2632687">https://doi.org/10.1117/12.2632687</a>
  bibtex: '@inproceedings{Heermeier_Jung_Lindemann_Gerhardt_Hofmann_Heuser_Große_Kaganskiy_Reitzenstein_2022,
    title={Spin lasing in high-beta bimodal quantum dot micropillar cavities }, DOI={<a
    href="https://doi.org/10.1117/12.2632687">10.1117/12.2632687</a>}, booktitle={Spintronics
    XV}, author={Heermeier, Niels and Jung, Natalie and Lindemann, Markus and Gerhardt,
    Nils Christopher and Hofmann, Martin R. and Heuser, Tobias and Große, Jan and
    Kaganskiy, Arsenty and Reitzenstein, Stephan}, year={2022} }'
  chicago: Heermeier, Niels, Natalie Jung, Markus Lindemann, Nils Christopher Gerhardt,
    Martin R. Hofmann, Tobias Heuser, Jan Große, Arsenty Kaganskiy, and Stephan Reitzenstein.
    “Spin Lasing in High-Beta Bimodal Quantum Dot Micropillar Cavities .” In <i>Spintronics
    XV</i>, 2022. <a href="https://doi.org/10.1117/12.2632687">https://doi.org/10.1117/12.2632687</a>.
  ieee: 'N. Heermeier <i>et al.</i>, “Spin lasing in high-beta bimodal quantum dot
    micropillar cavities ,” 2022, doi: <a href="https://doi.org/10.1117/12.2632687">10.1117/12.2632687</a>.'
  mla: Heermeier, Niels, et al. “Spin Lasing in High-Beta Bimodal Quantum Dot Micropillar
    Cavities .” <i>Spintronics XV</i>, 2022, doi:<a href="https://doi.org/10.1117/12.2632687">10.1117/12.2632687</a>.
  short: 'N. Heermeier, N. Jung, M. Lindemann, N.C. Gerhardt, M.R. Hofmann, T. Heuser,
    J. Große, A. Kaganskiy, S. Reitzenstein, in: Spintronics XV, 2022.'
date_created: 2026-02-20T10:03:52Z
date_updated: 2026-02-26T08:36:42Z
department:
- _id: '977'
doi: 10.1117/12.2632687
language:
- iso: eng
publication: Spintronics XV
status: public
title: 'Spin lasing in high-beta bimodal quantum dot micropillar cavities '
type: conference
user_id: '15911'
year: '2022'
...
