@inproceedings{41881,
  author       = {{Pelucchi, E and Fagas, G and  Aharonovich, I and Englund, D and Figueroa, E and Gong, Q and Hannes, H and Liu, J and Lu, C-Y and Matsuda, N and Pan, J.W and Schreck, F and Sciarrino, F and Silberhorn, Christine and Wang, J and Jöns, Klaus D.}},
  number       = {{3}},
  pages        = {{194--208}},
  title        = {{{The potential and global outlook of integrated photonics for quantum technologi}}},
  volume       = {{4}},
  year         = {{2022}},
}

@article{34700,
  author       = {{Gharibian, Sevag and Santha, Miklos and Sikora, Jamie and Sundaram, Aarthi and Yirka, Justin}},
  issn         = {{1016-3328}},
  journal      = {{Computational Complexity}},
  keywords     = {{Computational Mathematics, Computational Theory and Mathematics, General Mathematics, Theoretical Computer Science}},
  number       = {{2}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Quantum generalizations of the polynomial hierarchy with applications to QMA(2)}}},
  doi          = {{10.1007/s00037-022-00231-8}},
  volume       = {{31}},
  year         = {{2022}},
}

@article{28254,
  abstract     = {{With the rapid advances of functional dielectric metasurfaces and their integration on on-chip nanophotonic devices, the necessity of metasurfaces working in different environments, especially in biological applications, arose. However, the metasurfaces’ performance is tied to the unit cell’s efficiency and ultimately the surrounding environment it was designed for, thus reducing its applicability if exposed to altering refractive index media. Here, we report a method to increase a metasurface’s versatility by covering the high-index metasurface with a low index porous SiO2 film, protecting the metasurface from environmental changes while keeping the working efficiency unchanged. We show, that a covered metasurface retains its functionality even when exposed to fluidic environments.}},
  author       = {{Geromel, René and Weinberger, Christian and Brormann, Katja and Tiemann, Michael and Zentgraf, Thomas}},
  issn         = {{2159-3930}},
  journal      = {{Optical Materials Express}},
  number       = {{1}},
  pages        = {{13--21}},
  publisher    = {{Optica}},
  title        = {{{Porous SiO2 coated dielectric metasurface with consistent performance independent of environmental conditions}}},
  doi          = {{10.1364/ome.444264}},
  volume       = {{12}},
  year         = {{2022}},
}

@article{37318,
  abstract     = {{<jats:title>Abstract</jats:title>
               <jats:p>The interaction between quantum light and matter is being intensively studied for systems that are enclosed in high-<jats:italic>Q</jats:italic> cavities which strongly enhance the light–matter coupling. Cavities with low <jats:italic>Q</jats:italic>-factors are generally given less attention due to their high losses that quickly destroy quantum systems. However, bad cavities can be utilized for several applications, where lower <jats:italic>Q</jats:italic>-factors are required, e.g., to increase the spectral width of the cavity mode. In this work, we demonstrate that low-<jats:italic>Q</jats:italic> cavities can be beneficial for preparing specific electronic steady states when certain quantum states of light are applied. We investigate the interaction between quantum light with various statistics and matter represented by a Λ-type three-level system in lossy cavities, assuming that cavity losses are the dominant loss mechanism. We show that cavity losses lead to non-trivial electronic steady states that can be controlled by the loss rate and the initial statistics of the quantum fields. We discuss the mechanism of the formation of such steady states on the basis of the equations of motion and present both analytical expressions and numerical simulations for such steady states.</jats:p>}},
  author       = {{Rose, Hendrik and Tikhonova, O V and Meier, Torsten and Sharapova, Polina}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  keywords     = {{General Physics and Astronomy}},
  number       = {{6}},
  publisher    = {{IOP Publishing}},
  title        = {{{Steady states of Λ-type three-level systems excited by quantum light with various photon statistics in lossy cavities}}},
  doi          = {{10.1088/1367-2630/ac74d8}},
  volume       = {{24}},
  year         = {{2022}},
}

@article{37319,
  author       = {{Grisard, S. and Rose, Hendrik and Trifonov, A. V. and Reichhardt, R. and Reiter, D. E. and Reichelt, Matthias and Schneider, C. and Kamp, M. and Höfling, S. and Bayer, M. and Meier, Torsten and Akimov, I. A.}},
  issn         = {{2469-9950}},
  journal      = {{Physical Review B}},
  number       = {{20}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Multiple Rabi rotations of trions in InGaAs quantum dots observed by photon echo spectroscopy with spatially shaped laser pulses}}},
  doi          = {{10.1103/physrevb.106.205408}},
  volume       = {{106}},
  year         = {{2022}},
}

@inproceedings{37327,
  author       = {{Rose, Hendrik and Tikhonova, Olga V. and Meier, Torsten and Sharapova, Polina}},
  booktitle    = {{Ultrafast Phenomena and Nanophotonics XXVI}},
  editor       = {{Betz, Markus and Elezzabi, Abdulhakem Y.}},
  title        = {{{Theoretical analysis of correlations between two quantum fields exciting a three-level system using the cluster-expansion approach}}},
  doi          = {{10.1117/12.2608528}},
  volume       = {{11999}},
  year         = {{2022}},
}

@article{40523,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Tailored nanoscale quantum light sources, matching the specific needs of use cases, are crucial building blocks for photonic quantum technologies. Several different approaches to realize solid-state quantum emitters with high performance have been pursued and different concepts for energy tuning have been established. However, the properties of the emitted photons are always defined by the individual quantum emitter and can therefore not be controlled with full flexibility. Here we introduce an all-optical nonlinear method to tailor and control the single photon emission. We demonstrate a laser-controlled down-conversion process from an excited state of a semiconductor quantum three-level system. Based on this concept, we realize energy tuning and polarization control of the single photon emission with a control-laser field. Our results mark an important step towards tailored single photon emission from a photonic quantum system based on quantum optical principles.</jats:p>}},
  author       = {{Jonas, B. and Heinze, Dirk Florian and Schöll, E. and Kallert, P. and Langer, T. and Krehs, S. and Widhalm, A. and Jöns, Klaus and Reuter, Dirk and Schumacher, Stefan and Zrenner, Artur}},
  issn         = {{2041-1723}},
  journal      = {{Nature Communications}},
  keywords     = {{General Physics and Astronomy, General Biochemistry, Genetics and Molecular Biology, General Chemistry, Multidisciplinary}},
  number       = {{1}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Nonlinear down-conversion in a single quantum dot}}},
  doi          = {{10.1038/s41467-022-28993-3}},
  volume       = {{13}},
  year         = {{2022}},
}

@article{40431,
  author       = {{Praschan, Tom and Heinze, Dirk and Breddermann, Dominik and Zrenner, Artur and Walther, Andrea and Schumacher, Stefan}},
  issn         = {{2469-9950}},
  journal      = {{Physical Review B}},
  number       = {{4}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton}}},
  doi          = {{10.1103/physrevb.105.045302}},
  volume       = {{105}},
  year         = {{2022}},
}

@article{33484,
  abstract     = {{We study the DC conductivity in potassium titanyl phosphate (KTiOPO4, KTP) and its isomorphs KTiOAsO4 (KTA) and Rb1%K99%TiOPO4 (RKTP) and introduce a method by which to reduce the overall ionic conductivity in KTP by a potassium nitrate treatment. Furthermore, we create so-called gray tracking in KTP and investigate the ionic conductivity in theses areas. A local unintended reduction of the ionic conductivity is observed in the gray-tracked regions, which also induce additional optical absorption in the material. We show that a thermal treatment in an oxygen-rich atmosphere removes the gray tracking and brings the ionic conductivity as well as the optical transmission back to the original level. These studies can help to choose the best material and treatment for specific applications.}},
  author       = {{Padberg, Laura and Quiring, Viktor and Bocchini, Adriana and Santandrea, Matteo and Gerstmann, Uwe and Schmidt, Wolf Gero and Silberhorn, Christine and Eigner, Christof}},
  issn         = {{2073-4352}},
  journal      = {{Crystals}},
  pages        = {{1359}},
  title        = {{{DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking}}},
  doi          = {{10.3390/cryst12101359}},
  volume       = {{12}},
  year         = {{2022}},
}

@article{34884,
  author       = {{Prasannan, Nidhin and Sperling, Jan and Brecht, Benjamin and Silberhorn, Christine}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  keywords     = {{General Physics and Astronomy}},
  number       = {{26}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Direct Measurement of Higher-Order Nonlinear Polarization Squeezing}}},
  doi          = {{10.1103/physrevlett.129.263601}},
  volume       = {{129}},
  year         = {{2022}},
}

@article{32068,
  abstract     = {{Inspired by plant grafting, grafted vortex beams can be formed through grafting two or more helical phase profiles of optical vortex beams. Recently, grafted perfect vortex beams (GPVBs) have attracted much attention due to their unique optical properties and potential applications. However, the current method to generate and manipulate GPVBs requires a complex and bulky optical system, hindering further investigation and limiting its practical applications. Here, a compact metasurface approach for generating and manipulating GPVBs in multiple channels is proposed and demonstrated, which eliminates the need for such a complex optical setup. A single metasurface is utilized to realize various superpositions of GPVBs with different combinations of topological charges in four channels, leading to asymmetric singularity distributions. The positions of singularities in the superimposed beam can be further modulated by introducing an initial phase difference in the metasurface design. The work demonstrates a compact metasurface platform that performs a sophisticated optical task that is very challenging with conventional optics, opening opportunities for the investigation and applications of GPVBs in a wide range of emerging application areas, such as singular optics and quantum science.}},
  author       = {{Ahmed, Hammad and Intaravanne, Yuttana and Ming, Yang and Ansari, Muhammad Afnan and Buller, Gerald S. and Zentgraf, Thomas and Chen, Xianzhong}},
  issn         = {{0935-9648}},
  journal      = {{Advanced Materials}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}},
  number       = {{30}},
  publisher    = {{Wiley}},
  title        = {{{Multichannel Superposition of Grafted Perfect Vortex Beams}}},
  doi          = {{10.1002/adma.202203044}},
  volume       = {{34}},
  year         = {{2022}},
}

@inproceedings{34238,
  abstract     = {{<jats:p>A monolithically integrated electronic-photonic Mach-Zehnder modulator is presented, incorporating electronic linear drivers along photonic components. An electro-optical 3 dB &amp; 6 dB bandwidth of 24 GHz and 34 GHz respectively was measured. The on-chip drivers decrease the V<jats:italic>
      <jats:sub>π</jats:sub>
    </jats:italic> by a factor of 10.</jats:p>}},
  author       = {{Kress, Christian and Schwabe, Tobias and Rhee, Hanjo and Kerman, Sarp and Scheytt, J. Christoph}},
  booktitle    = {{Optica Advanced Photonics Congress 2022}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Broadband Mach-Zehnder Modulator with Linear Driver in Electronic-Photonic Co-Integrated Platform}}},
  doi          = {{10.1364/iprsn.2022.im4c.1}},
  year         = {{2022}},
}

@inproceedings{46484,
  abstract     = {{Efficient third-harmonic generation control is theoretically studied. Dielectric nanostructures placed on the metallic substrate could offer effective geometric-phase modulation on third-harmonic signals by selecting proper structure rotational symmetry.}},
  author       = {{Liu, Bingyi and Huang, Lingling and Zentgraf, Thomas}},
  booktitle    = {{Conference on Lasers and Electro-Optics}},
  location     = {{San Jose, USA}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Efficient Third-harmonic Generation Control with Ultrathin Dielectric Geometric-phase Metasurface}}},
  doi          = {{10.1364/cleo_qels.2022.fth1a.7}},
  year         = {{2022}},
}

@article{32088,
  abstract     = {{Subwavelength dielectric resonators assembled into metasurfaces have become a versatile tool for miniaturizing optical components approaching the nanoscale. An important class of metasurface functionalities is associated with asymmetry in both the generation and transmission of light with respect to reversals of the positions of emitters and receivers. The nonlinear light–matter interaction in metasurfaces offers a promising pathway towards miniaturization of the asymmetric control of light. Here we demonstrate asymmetric parametric generation of light in nonlinear metasurfaces. We assemble dissimilar nonlinear dielectric resonators into translucent metasurfaces that produce images in the visible spectral range on being illuminated by infrared radiation. By design, the metasurfaces produce different and completely independent images for the reversed direction of illumination, that is, when the positions of the infrared emitter and the visible light receiver are exchanged. Nonlinearity-enabled asymmetric control of light by subwavelength resonators paves the way towards novel nanophotonic components via dense integration of large quantities of nonlinear resonators into compact metasurface designs.}},
  author       = {{Kruk, Sergey S. and Wang, Lei and Sain, Basudeb and Dong, Zhaogang and Yang, Joel and Zentgraf, Thomas and Kivshar, Yuri}},
  issn         = {{1749-4885}},
  journal      = {{Nature Photonics}},
  keywords     = {{Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}},
  pages        = {{561–565}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Asymmetric parametric generation of images with nonlinear dielectric metasurfaces}}},
  doi          = {{10.1038/s41566-022-01018-7}},
  volume       = {{16}},
  year         = {{2022}},
}

@article{32310,
  author       = {{Li, Yao and Ma, Xuekai and Zhai, Xiaokun and Gao, Meini and Dai, Haitao and Schumacher, Stefan and Gao, Tingge}},
  issn         = {{2041-1723}},
  journal      = {{Nature Communications}},
  keywords     = {{General Physics and Astronomy, General Biochemistry, Genetics and Molecular Biology, General Chemistry, Multidisciplinary}},
  number       = {{1}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Manipulating polariton condensates by Rashba-Dresselhaus coupling at room temperature}}},
  doi          = {{10.1038/s41467-022-31529-4}},
  volume       = {{13}},
  year         = {{2022}},
}

@inproceedings{41800,
  author       = {{Sartison, M and  Camacho Ibarra, O and Jöns, Klaus D. and Caltzidis, I and Reuter, Dirk}},
  title        = {{{Scalable integration of quantum emitters into photonic integrated circuits}}},
  doi          = {{https://doi.org/10.1088/2633-4356/ac6f3e}},
  volume       = {{2}},
  year         = {{2022}},
}

@article{33670,
  author       = {{Schapeler, Timon and Bartley, Tim}},
  issn         = {{2469-9926}},
  journal      = {{Physical Review A}},
  number       = {{1}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Information extraction in photon-counting experiments}}},
  doi          = {{10.1103/physreva.106.013701}},
  volume       = {{106}},
  year         = {{2022}},
}

@inproceedings{63039,
  abstract     = {{<jats:p>We report on coherent transmission of beyond 100 GBd signaling based on plasmonic technology. Using dual-drive plasmonic-organic-hybrid I/Q modulator on silicon photonics platform, we demonstrate the successful transmission of 160-GBaud QPSK and 140-GBaud 16QAM modulations.</jats:p>}},
  author       = {{Mardoyan, Haïk and Jorge, Filipe and Destraz, Marcel and Duval, Bernadette and Bitachon, Bertold and Horst, Yannik and Benyahya, Kaoutar and Blache, Fabrice and Goix, Michel and De Leo, Eva and Habegger, Patrick and Meier, Norbert and Del Medico, Nino and Tedaldi, Valentino and Funck, Christian and Güsken, Nicholas Alexander and Leuthold, Juerg and Renaudier, Jéremie and Hoessbacher, Claudia and Heni, Wolfgang and Baeuerle, Benedikt}},
  booktitle    = {{Optical Fiber Communication Conference (OFC) 2022}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Generation and transmission of 160-Gbaud QPSK Coherent Signals using a Dual-Drive Plasmonic-Organic Hybrid I/Q modulator on Silicon Photonics}}},
  doi          = {{10.1364/ofc.2022.th1j.5}},
  year         = {{2022}},
}

@inproceedings{63041,
  author       = {{Güsken, Nicholas Alexander}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Plasmonic PICs—Terabit Modulation on the Micrometer Scale}}},
  doi          = {{https://opg.optica.org/abstract.cfm?URI=ECEOC-2022-Tu4E.3}},
  year         = {{2022}},
}

@article{30921,
  abstract     = {{Quantum walks function as essential means to implement quantum simulators, allowing one to study complex and often directly inaccessible quantum processes in controllable systems. In this contribution, the notion of a driven Gaussian quantum walk is introduced. In contrast to typically considered quantum walks in optical settings, we describe the operation of the walk in terms of a nonlinear map rather than a unitary operation, e.g., by replacing a beam-splitter-type coin with a two-mode squeezer, being a process that is controlled and driven by a pump field. This opens previously unattainable possibilities for quantum walks that include nonlinear elements as core components of their operation, vastly extending their range of applications. A full framework for driven Gaussian quantum walks is developed, including methods to dynamically characterize nonlinear, quantum, and quantum-nonlinear effects. Moreover, driven Gaussian quantum walks are compared with their classically interfering and linear counterparts, which are based on classical coherence of light rather than quantum superpositions. In particular, the generation and boost of highly multimode entanglement, squeezing, and other quantum effects are studied over the duration of the nonlinear walk. Importantly, we prove the quantumness of the evolution itself, regardless of the input state. A scheme for an experimental realization is proposed. Furthermore, nonlinear properties of driven Gaussian quantum walks are explored, such as amplification that leads to an ever increasing number of correlated quantum particles, constituting a source of new walkers during the walk. Therefore, a concept for quantum walks is proposed that leads to—and even produces—directly accessible quantum phenomena, and that renders the quantum simulation of nonlinear processes possible.}},
  author       = {{Held, Philip and Engelkemeier, Melanie and De, Syamsundar and Barkhofen, Sonja and Sperling, Jan and Silberhorn, Christine}},
  issn         = {{2469-9926}},
  journal      = {{Physical Review A}},
  number       = {{4}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Driven Gaussian quantum walks}}},
  doi          = {{10.1103/physreva.105.042210}},
  volume       = {{105}},
  year         = {{2022}},
}