---
_id: '6542'
abstract:
- lang: eng
text: Transient changes of the optical response of WS2 monolayers are studied by
femtosecond broadband pump–probe spectroscopy. Time-dependent absorption spectra
are analyzed by tracking the line width broadening, bleaching, and energy shift
of the main exciton resonance as a function of time delay after the excitation.
Two main sources for the pump-induced changes of the optical response are identified.
Specifically, we find an interplay between modifications induced by many-body
interactions from photoexcited carriers and by the subsequent transfer of the
excitation to the phonon system followed by cooling of the material through the
heat transfer to the substrate.
article_type: original
author:
- first_name: Claudia
full_name: Ruppert, Claudia
last_name: Ruppert
- first_name: Alexey
full_name: Chernikov, Alexey
last_name: Chernikov
- first_name: Heather M.
full_name: Hill, Heather M.
last_name: Hill
- first_name: Albert F.
full_name: Rigosi, Albert F.
last_name: Rigosi
- first_name: Tony F.
full_name: Heinz, Tony F.
last_name: Heinz
citation:
ama: Ruppert C, Chernikov A, Hill HM, Rigosi AF, Heinz TF. The Role of Electronic
and Phononic Excitation in the Optical Response of Monolayer WS2 after Ultrafast
Excitation. Nano Letters. 2017;17(2):644-651. doi:10.1021/acs.nanolett.6b03513
apa: Ruppert, C., Chernikov, A., Hill, H. M., Rigosi, A. F., & Heinz, T. F.
(2017). The Role of Electronic and Phononic Excitation in the Optical Response
of Monolayer WS2 after Ultrafast Excitation. Nano Letters, 17(2),
644–651. https://doi.org/10.1021/acs.nanolett.6b03513
bibtex: '@article{Ruppert_Chernikov_Hill_Rigosi_Heinz_2017, title={The Role of Electronic
and Phononic Excitation in the Optical Response of Monolayer WS2 after Ultrafast
Excitation}, volume={17}, DOI={10.1021/acs.nanolett.6b03513},
number={2}, journal={Nano Letters}, publisher={American Chemical Society (ACS)},
author={Ruppert, Claudia and Chernikov, Alexey and Hill, Heather M. and Rigosi,
Albert F. and Heinz, Tony F.}, year={2017}, pages={644–651} }'
chicago: 'Ruppert, Claudia, Alexey Chernikov, Heather M. Hill, Albert F. Rigosi,
and Tony F. Heinz. “The Role of Electronic and Phononic Excitation in the Optical
Response of Monolayer WS2 after Ultrafast Excitation.” Nano Letters 17,
no. 2 (2017): 644–51. https://doi.org/10.1021/acs.nanolett.6b03513.'
ieee: C. Ruppert, A. Chernikov, H. M. Hill, A. F. Rigosi, and T. F. Heinz, “The
Role of Electronic and Phononic Excitation in the Optical Response of Monolayer
WS2 after Ultrafast Excitation,” Nano Letters, vol. 17, no. 2, pp. 644–651,
2017.
mla: Ruppert, Claudia, et al. “The Role of Electronic and Phononic Excitation in
the Optical Response of Monolayer WS2 after Ultrafast Excitation.” Nano Letters,
vol. 17, no. 2, American Chemical Society (ACS), 2017, pp. 644–51, doi:10.1021/acs.nanolett.6b03513.
short: C. Ruppert, A. Chernikov, H.M. Hill, A.F. Rigosi, T.F. Heinz, Nano Letters
17 (2017) 644–651.
date_created: 2019-01-09T10:00:23Z
date_updated: 2022-01-06T07:03:11Z
department:
- _id: '230'
doi: 10.1021/acs.nanolett.6b03513
intvolume: ' 17'
issue: '2'
keyword:
- Atomically thin 2D materials
- carrier and phonon dynamics
- ultrafast spectroscopy
language:
- iso: eng
page: 644-651
project:
- _id: '53'
name: TRR 142
- _id: '54'
name: TRR 142 - Project Area A
- _id: '58'
name: TRR 142 - Subproject A1
publication: Nano Letters
publication_identifier:
issn:
- 1530-6984
- 1530-6992
publication_status: published
publisher: American Chemical Society (ACS)
status: public
title: The Role of Electronic and Phononic Excitation in the Optical Response of Monolayer
WS2 after Ultrafast Excitation
type: journal_article
user_id: '49428'
volume: 17
year: '2017'
...
---
_id: '6543'
abstract:
- lang: eng
text: Up to 400 mW of near-IR (1370-1500 nm) femtosecond pulses are generated from
an optical parametric amplifier directly driven by a Yb:fiber oscillator delivering
100\&\#x00A0;fs pulses at 1036 nm. The process is seeded by a stable supercontinuum
obtained from a photonic crystal fiber. We use a single pass through a 3 mm, magnesium
oxide-doped, periodically poled LiNbO3 downconversion crystal to produce a near-IR
pulse train with a remarkable power stability of 1.4 % (RMS) during one hour.
Tuning is achieved by the temperature and the poling period of the nonlinear crystal.
article_type: original
author:
- first_name: J.
full_name: Mundry, J.
last_name: Mundry
- first_name: J.
full_name: Lohrenz, J.
last_name: Lohrenz
- first_name: M.
full_name: Betz, M.
last_name: Betz
citation:
ama: Mundry J, Lohrenz J, Betz M. Tunable femtosecond near-IR source by pumping
an OPA directly with a 90 MHz Yb:fiber source. Applied Optics. 2017;56(11):3104-3108.
doi:10.1364/AO.56.003104
apa: Mundry, J., Lohrenz, J., & Betz, M. (2017). Tunable femtosecond near-IR
source by pumping an OPA directly with a 90 MHz Yb:fiber source. Applied Optics,
56(11), 3104–3108. https://doi.org/10.1364/AO.56.003104
bibtex: '@article{Mundry_Lohrenz_Betz_2017, title={Tunable femtosecond near-IR source
by pumping an OPA directly with a 90 MHz Yb:fiber source}, volume={56}, DOI={10.1364/AO.56.003104}, number={11},
journal={Applied Optics}, publisher={OSA}, author={Mundry, J. and Lohrenz, J.
and Betz, M.}, year={2017}, pages={3104–3108} }'
chicago: 'Mundry, J., J. Lohrenz, and M. Betz. “Tunable Femtosecond Near-IR Source
by Pumping an OPA Directly with a 90 MHz Yb:Fiber Source.” Applied Optics
56, no. 11 (2017): 3104–8. https://doi.org/10.1364/AO.56.003104.'
ieee: J. Mundry, J. Lohrenz, and M. Betz, “Tunable femtosecond near-IR source by
pumping an OPA directly with a 90 MHz Yb:fiber source,” Applied Optics,
vol. 56, no. 11, pp. 3104–3108, 2017.
mla: Mundry, J., et al. “Tunable Femtosecond Near-IR Source by Pumping an OPA Directly
with a 90 MHz Yb:Fiber Source.” Applied Optics, vol. 56, no. 11, OSA, 2017,
pp. 3104–08, doi:10.1364/AO.56.003104.
short: J. Mundry, J. Lohrenz, M. Betz, Applied Optics 56 (2017) 3104–3108.
date_created: 2019-01-09T10:06:44Z
date_updated: 2022-01-06T07:03:11Z
department:
- _id: '230'
doi: 10.1364/AO.56.003104
intvolume: ' 56'
issue: '11'
keyword:
- Infrared and far-infrared lasers
- Ultrafast lasers
- Nonlinear optics
- parametric processes
- Parametric oscillators and amplifiers
- Femtosecond pulses
- Fiber lasers
- Fused silica
- Laser systems
- Photonic crystal fibers
- Pulse propagation
language:
- iso: eng
page: 3104-3108
project:
- _id: '53'
name: TRR 142
- _id: '54'
name: TRR 142 - Project Area A
- _id: '58'
name: TRR 142 - Subproject A1
publication: Applied Optics
publisher: OSA
status: public
title: Tunable femtosecond near-IR source by pumping an OPA directly with a 90 MHz
Yb:fiber source
type: journal_article
user_id: '49428'
volume: 56
year: '2017'
...