TY - JOUR AU - Heinisch, Nils AU - Köcher, Nikolas AU - Bauch, David AU - Schumacher, Stefan ID - 50829 IS - 1 JF - Physical Review Research SN - 2643-1564 TI - Swing-up dynamics in quantum emitter cavity systems: Near ideal single photons and entangled photon pairs VL - 6 ER - TY - JOUR AU - Cui, Tie Jun AU - Zhang, Shuang AU - Alu, Andrea AU - Wegener, Martin AU - Pendry, John AU - Luo, Jie AU - Lai, Yun AU - Wang, Zuojia AU - Lin, Xiao AU - Chen, Hongsheng AU - Chen, Ping AU - Wu, Rui-Xin AU - Yin, Yuhang AU - Zhao, Pengfei AU - Chen, Huanyang AU - Li, Yue AU - Zhou, Ziheng AU - Engheta, Nader AU - Asadchy, V. S. AU - Simovski, Constantin AU - Tretyakov, Sergei A AU - Yang, Biao AU - Campbell, Sawyer D. AU - Hao, Yang AU - Werner, Douglas H AU - Sun, Shulin AU - Zhou, Lei AU - Xu, Su AU - Sun, Hong-Bo AU - Zhou, Zhou AU - Li, Zile AU - Zheng, Guoxing AU - Chen, Xianzhong AU - Li, Tao AU - Zhu, Shi-Ning AU - Zhou, Junxiao AU - Zhao, Junxiang AU - Liu, Zhaowei AU - Zhang, Yuchao AU - Zhang, Qiming AU - Gu, Min AU - Xiao, Shumin AU - Liu, Yongmin AU - Zhang, Xiaoyu AU - Tang, Yutao AU - Li, Guixin AU - Zentgraf, Thomas AU - Koshelev, Kirill AU - Kivshar, Yuri S. AU - Li, Xin AU - Badloe, Trevon AU - Huang, Lingling AU - Rho, Junsuk AU - Wang, Shuming AU - Tsai, Din Ping AU - Bykov, A. Yu. AU - Krasavin, Alexey V AU - Zayats, Anatoly V AU - McDonnell, Cormac AU - Ellenbogen, Tal AU - Luo, Xiangang AU - Pu, Mingbo AU - Garcia-Vidal, Francisco J AU - Liu, Liangliang AU - Li, Zhuo AU - Tang, Wenxuan AU - Ma, Hui Feng AU - Zhang, Jingjing AU - Luo, Yu AU - Zhang, Xuanru AU - Zhang, Hao Chi AU - He, Pei Hang AU - Zhang, Le Peng AU - Wan, Xiang AU - Wu, Haotian AU - Liu, Shuo AU - Jiang, Wei Xiang AU - Zhang, Xin Ge AU - Qiu, Chengwei AU - Ma, Qian AU - Liu, Che AU - Li, Long AU - Han, Jiaqi AU - Li, Lianlin AU - Cotrufo, Michele AU - Caloz, Christophe AU - Deck-Léger, Z.-L. AU - Bahrami, A. AU - Céspedes, O. AU - Galiffi, Emanuele AU - Huidobro, P. A. AU - Cheng, Qiang AU - Dai, Jun Yan AU - Ke, Jun Cheng AU - Zhang, Lei AU - Galdi, Vincenzo AU - Di Renzo, Marco ID - 51519 JF - Journal of Physics: Photonics KW - Electrical and Electronic Engineering KW - Atomic and Molecular Physics KW - and Optics KW - Electronic KW - Optical and Magnetic Materials SN - 2515-7647 TI - Roadmap on electromagnetic metamaterials and metasurfaces ER - TY - JOUR AB - We explore the polarization hysteretic behaviour and field-dependent permittivity of ferroelectric-dielectric 2D materials formed by random dispersions of low permittivity inclusions in a ferroelectric matrix, using finite element simulations. We show how the degree of impenetrability of dielectric inclusions plays a substantial role in controlling the coercive field, remnant and saturation polarizations of the homogenized materials. The results highlight the significance of the degree of impenetrability of inclusion in tuning the effective polarization properties of such ferroelectric composites: coercive field drops significantly as percolation threshold is attained and remnant polarization decreases faster than a linear decay. AU - Myroshnychenko, Viktor AU - Mulavarickal Jose, Pious Mathews AU - Farheen, Henna AU - Ejaz, Shafaq AU - Brosseau, Christian AU - Förstner, Jens ID - 52700 IS - 4 JF - Physica Scripta KW - tet_topic_ferro SN - 0031-8949 TI - From Swiss-cheese to discrete ferroelectric composites: assessing the ferroelectric butterfly shape in polarization loops VL - 99 ER - TY - JOUR AB - Miller's rule is an empirical relation between the nonlinear and linear optical coefficients that applies to a large class of materials but has only been rigorously derived for the classical Lorentz model with a weak anharmonic perturbation. In this work, we extend the proof and present a detailed derivation of Miller's rule for an equivalent quantum-mechanical anharmonic oscillator. For this purpose, the classical concept of velocity-dependent damping inherent to the Lorentz model is replaced by an adiabatic switch-on of the external electric field, which allows a unified treatment of the classical and quantum-mechanical systems using identical potentials and fields. Although the dynamics of the resulting charge oscillations, and hence the induced polarizations, deviate due to the finite zero-point motion in the quantum-mechanical framework, we find that Miller's rule is nevertheless identical in both cases up to terms of first order in the anharmonicity. With a view to practical applications, especially in the context of ab initio calculations for the optical response where adiabatically switched-on fields are widely assumed, we demonstrate that a correct treatment of finite broadening parameters is essential to avoid spurious errors that may falsely suggest a violation of Miller's rule, and we illustrate this point by means of a numerical example. AU - Meyer, Maximilian Tim AU - Schindlmayr, Arno ID - 52723 JF - Journal of Physics B: Atomic, Molecular and Optical Physics SN - 0953-4075 TI - Derivation of Miller's rule for the nonlinear optical susceptibility of a quantum anharmonic oscillator ER - TY - JOUR AB - Superconducting nanowire single-photon detectors (SNSPDs) show near unity efficiency, low dark count rate, and short recovery time. Combining these characteristics with temporal control of SNSPDs broadens their applications as in active de-latching for higher dynamic range counting or temporal filtering for pump-probe spectroscopy or LiDAR. To that end, we demonstrate active gating of an SNSPD with a minimum off-to-on rise time of 2.4 ns and a total gate length of 5.0 ns. We show how the rise time depends on the inductance of the detector in combination with the control electronics. The gate window is demonstrated to be fully and freely, electrically tunable up to 500 ns at a repetition rate of 1.0 MHz, as well as ungated, free-running operation. Control electronics to generate the gating are mounted on the 2.3 K stage of a closed-cycle sorption cryostat, while the detector is operated on the cold stage at 0.8 K. We show that the efficiency and timing jitter of the detector is not altered during the on-time of the gating window. We exploit gated operation to demonstrate a method to increase in the photon counting dynamic range by a factor 11.2, as well as temporal filtering of a strong pump in an emulated pump-probe experiment. AU - Hummel, Thomas AU - Widhalm, Alex AU - Höpker, Jan Philipp AU - Jöns, Klaus AU - Chang, Jin AU - Fognini, Andreas AU - Steinhauer, Stephan AU - Zwiller, Val AU - Zrenner, Artur AU - Bartley, Tim ID - 36471 IS - 1 JF - Optics Express KW - Atomic and Molecular Physics KW - and Optics SN - 1094-4087 TI - Nanosecond gating of superconducting nanowire single-photon detectors using cryogenic bias circuitry VL - 31 ER - TY - JOUR AU - Sharapova, Polina R. AU - Kruk, Sergey S. AU - Solntsev, Alexander S. ID - 41035 JF - Laser & Photonics Reviews KW - Condensed Matter Physics KW - Atomic and Molecular Physics KW - and Optics KW - Electronic KW - Optical and Magnetic Materials SN - 1863-8880 TI - Nonlinear Dielectric Nanoresonators and Metasurfaces: Toward Efficient Generation of Entangled Photons ER - TY - CONF AB - This paper presents a method to model monolithically integrated photonic radar transceiver (TRX) with optical local oscillator (LO) distribution in silicon germanium (SiGe) electronic photonic integrated circuits (EPICs). The model proposed approximates the behavior of the nonlinear scattering (S)-parameters and noise figure of each building block of the TRX chipset by Laplace polynomials and hyperbolic tangent functions. The modular approach of the model allows to optimize hardware components with respect to the entire TRX system, and fault identification with reduced computational effort. The proposed method is validated using the first monolithically integrated photonic radar transceiver chipset and shows excellent agreement with the post layout simulation results and, including the photodiode (PD) bandwidth (BW) degradation, also with the measurements. AU - Kruse, Stephan AU - Schwabe, Tobias AU - Kneuper, Pascal AU - Meinecke, Marc-Michael AU - Kurz, Heiko G. AU - Scheytt, J. Christoph ID - 42804 TI - Nonlinear S-Parameter Behavioral Model of a Photonic Radar Transceiver Chipset for Automotive Applications ER - TY - JOUR AB - The achievement of a flat metasurface has realized extraordinary control over light–matter interaction at the nanoscale, enabling widespread use in imaging, holography, and biophotonics. However, three-dimensional metasurfaces with the potential to provide additional light–matter manipulation flexibility attract only little interest. Here, we demonstrate a three-dimensional metasurface scheme capable of providing dual phase control through out-of-plane plasmonic resonance of L-shape antennas. Under circularly polarized excitation at a specific wavelength, the L-shape antennas with rotating orientation angle act as spatially variant three-dimensional tilted dipoles and are able to generate desire phase delay for different polarization components. Generalized Snell's law is achieved for both in-plane and out-of-plane dipole components through arranging such L-shape antennas into arrays. These three-dimensional metasurfaces suggest a route for wavefront modulation and a variety of nanophotonic applications. AU - Li, Tianyou AU - Chen, Yanjie AU - Wang, Yongtian AU - Zentgraf, Thomas AU - Huang, Lingling ID - 43421 IS - 14 JF - Applied Physics Letters KW - Physics and Astronomy (miscellaneous) SN - 0003-6951 TI - Three-dimensional dipole momentum analog based on L-shape metasurface VL - 122 ER - TY - JOUR AU - De, Jianbo AU - Ma, Xuekai AU - Yin, Fan AU - Ren, Jiahuan AU - Yao, Jiannian AU - Schumacher, Stefan AU - Liao, Qing AU - Fu, Hongbing AU - Malpuech, Guillaume AU - Solnyshkov, Dmitry ID - 36416 IS - 3 JF - Journal of the American Chemical Society (JACS) KW - Colloid and Surface Chemistry KW - Biochemistry KW - General Chemistry KW - Catalysis SN - 0002-7863 TI - Room-Temperature Electrical Field-Enhanced Ultrafast Switch in Organic Microcavity Polariton Condensates VL - 145 ER - TY - JOUR AU - Jia, Jichao AU - Cao, Xue AU - Ma, Xuekai AU - De, Jianbo AU - Yao, Jiannian AU - Schumacher, Stefan AU - Liao, Qing AU - Fu, Hongbing ID - 35160 IS - 1 JF - Nature Communications KW - General Physics and Astronomy KW - General Biochemistry KW - Genetics and Molecular Biology KW - General Chemistry KW - Multidisciplinary SN - 2041-1723 TI - Circularly polarized electroluminescence from a single-crystal organic microcavity light-emitting diode based on photonic spin-orbit interactions VL - 14 ER - TY - JOUR AU - Rose, Hendrik AU - Vasil'ev, A. N. AU - Tikhonova, O. V. AU - Meier, Torsten AU - Sharapova, Polina ID - 37280 IS - 1 JF - Physical Review A SN - 2469-9926 TI - Quantum-optical excitations of semiconductor nanostructures in a microcavity using a two-band model and a single-mode quantum field VL - 107 ER - TY - CONF AB - We demonstrate the numerical and experimental realization of optimized optical traveling-wave antennas made of low-loss dielectric materials. These antennas exhibit highly directive radiation patterns and our studies reveal that this nature comes from two dominant guided TE modes excited in the waveguide-like director of the antenna, in addition to the leaky modes. The optimized antennas possess a broadband nature and have a nearunity radiation efficiency at an operational wavelength of 780 nm. Compared to the previously studied plasmonic antennas for photon emission, our all-dielectric approach demonstrates a new class of highly directional, low-loss, and broadband optical antennas. AU - Farheen, Henna AU - Yan, Lok-Yee AU - Leuteritz, Till AU - Qiao, Siqi AU - Spreyer, Florian AU - Schlickriede, Christian AU - Quiring, Viktor AU - Eigner, Christof AU - Silberhorn, Christine AU - Zentgraf, Thomas AU - Linden, Stefan AU - Myroshnychenko, Viktor AU - Förstner, Jens ED - García-Blanco, Sonia M. ED - Cheben, Pavel ID - 43051 KW - tet_topic_opticalantenna T2 - Integrated Optics: Devices, Materials, and Technologies XXVII TI - Tailoring the directive nature of optical waveguide antennas ER - TY - CONF AB - We demonstrate a large-scale two dimensional silicon-based optical phased array (OPA) composed of nanoantennas with circular gratings that are balanced in power and aligned in phase, required for producing desired radiation patterns in the far-field. The OPAs are numerically optimized to have an upward efficiency of up to 90%, targeting radiation concentration mainly in the field of view. We envision that our OPAs have the ability of generating complex holographic images, rendering them an attractive candidate for a wide range of applications like LiDAR sensors, optical trapping, optogenetic stimulation and augmented-reality displays. AU - Farheen, Henna AU - Strauch, Andreas AU - Scheytt, J. Christoph AU - Myroshnychenko, Viktor AU - Förstner, Jens ED - García-Blanco, Sonia M. ED - Cheben, Pavel ID - 43052 KW - tet_topic_opticalantenna T2 - Integrated Optics: Devices, Materials, and Technologies XXVII TI - Optimized silicon antennas for optical phased arrays ER - TY - JOUR AB - High-contrast slab waveguide Bragg gratings with 1D periodicity are investigated. For specific oblique excitation by semi-guided waves at sufficiently high angles of incidence, the idealized structures do not exhibit any radiative losses, such that reflectance and transmittance for the single port mode add strictly up to one. We consider a series of symmetric, fully and partly etched finite gratings, for parameters found in integrated silicon photonics. These can act as spectral filters with a reasonably flattop response. Apodization can lead to more box shaped reflectance and transmittance spectra. Together with a narrowband Fabry–Perot filter, these configurations are characterized by reflection bands, or transmittance peaks, with widths that span three orders of magnitude. AU - Hammer, Manfred AU - Farheen, Henna AU - Förstner, Jens ID - 43245 IS - 4 JF - Journal of the Optical Society of America B KW - tet_topic_waveguide SN - 0740-3224 TI - How to suppress radiative losses in high-contrast integrated Bragg gratings VL - 40 ER - TY - CONF AB - The nonlinear optical response of quantum well excitons is investigated experimentally using polarization resolved four wave mixing, optical-pump optical-probe, and optical-pump Terahertz-probe spectroscopy. The four-wave mixing data reveal clear signatures of coherent biexcitons which concur with straight-forward polarization selection rules at the Γ point. The type-I samples show the well-established time-domain beating signatures in the transients as well as the corresponding spectral signatures clearly. The latter are also present in type-II samples; however, the smaller exciton and biexciton binding energies in these structures infer longer beating times which, in turn, are accompanied by faster dephasing of the type-II exciton coherences. Furthermore, the THz absorption following spectrally narrow, picosecond excitation at energies in the vicinity of the 1s exciton resonance are discussed. Here, the optical signatures yield the well-established redshifts and blueshifts for the appropriate polarization geometries in type-I quantum well samples also termed “AC Stark Effect”. The THz probe reveals intriguing spectral features which can be ascribed to coherent negative absorption following an excitation into a virtual state for an excitation below the 1s exciton resonance. Furthermore, the scattering and ionization of excitons is discussed for several excitation geometries yielding control rules for elastic and inelastic quasiparticle collisions. AU - Meier, Torsten AU - Stein, M. AU - Schäfer, F. AU - Anders, D. AU - Littmann, J. H. AU - Fey, M. AU - Trautmann, Alexander AU - Ngo, C. AU - Steiner, J. T. AU - Reichelt, Matthias AU - Fuchs, C. AU - Volz, K. AU - Chatterjee, S. ID - 43189 T2 - Ultrafast Phenomena and Nanophotonics XXVII TI - Experimental studies of the excitonic nonlinear response of GaAs-based type-I and type-II quantum well structures interacting with optical and terahertz fields VL - 12419 ER - TY - CONF AB - Anomalous currents refer to electronic currents that flow perpendicularly to the direction of the accelerating electric field. Such anomalous currents can be generated when Terahertz fields are applied after an optical interband excitation of GaAs quantum wells. The underlying processes are investigated by numerical solutions of the semiconductor Bloch equations in the length gauge. Excitonic effects are included by treating the manybody Coulomb interaction in time-dependent Hartree-Fock approximation and additionally also carrier-phonon scattering processes are considered. The band structure and matrix elements are obtained from a 14-band k · p model within the envelope function approximation. The random phase factors of the matrix elements that appear due to the separate numerical diagonalization at each k-point are treated by applying a smooth gauge transformation. We present the macroscopic Berry curvature and anomalous current transients with and without excitonic effects. It is demonstrated that the resonant optical excitation of excitonic resonances can significantly enhance the Berry curvature and the anomalous currents. AU - Meier, Torsten AU - Ngo, C. AU - Priyadarshi, S. AU - Duc, H. T. AU - Bieler, M. ID - 43191 T2 - Ultrafast Phenomena and Nanophotonics XXVII TI - Terahertz-induced anomalous currents following the optical excitation of excitons in semiconductor quantum wells VL - 12419 ER - TY - CONF AB - The nonlinear optical response of quantum well excitons excited by optical fields is analyzed by numerical solutions of the semiconductor Bloch equations. Differential absorption spectra are computed for resonant pumping at the exciton resonance and the dependence of the absorption changes on the polarization directions of the pump and probe pulses is investigated. Coherent biexcitonic many-body correlations are included in our approach up to third-order in the optical fields. Results are presented for spatially-direct type-I and spatiallyindirect type-II quantum well systems. Due to the spatial inhomogeneity, in type-II structures a finite coupling between excitons of opposite spins exists already on the Hartree-Fock level and contributes to the absorption changes for the case of opposite circularly polarized pump and probe pulses. AU - Meier, Torsten AU - Trautmann, Alexander AU - Stein, M. AU - Schäfer, F. AU - Anders, D. AU - Ngo, C. AU - Steiner, J. T. AU - Reichelt, Matthias AU - Chatterjee, S. ID - 43190 T2 - Ultrafast Phenomena and Nanophotonics XXVII TI - Analysis of the nonlinear optical response of excitons in type-I and type-II quantum wells including many-body correlations VL - 12419 ER - TY - JOUR AU - Meier, Torsten AU - Schäfer, F. AU - Stein, M. AU - Lorenz, J. AU - Dobener, F. AU - Ngo, C. AU - Steiner, J. T. AU - Fuchs, C. AU - Stolz, W. AU - Volz, K. AU - Hader, J. AU - Moloney, J.V. AU - Koch, S.W. AU - Chatterjee, S. ID - 43139 IS - 8 JF - Applied Physics Letters TI - Gain recovery dynamics in active type-II semiconductor heterostructures VL - 122 ER - TY - GEN AU - Meier, Torsten AU - Grisard, S. AU - Trifonov, A.V. AU - Rose, Hendrik AU - Reichhardt, R. AU - Reichelt, Matthias AU - Schneider, C. AU - Kamp, M. AU - Höfling, S. AU - Bayer, M. AU - Akimov, I.A ID - 43132 T2 - arxiv:2302.02480 TI - Temporal sorting of optical multi-wave-mixing processes in semiconductor quantum dots ER - TY - JOUR AU - Lüders, Carolin AU - Pukrop, Matthias AU - Barkhausen, Franziska AU - Rozas, Elena AU - Schneider, Christian AU - Höfling, Sven AU - Sperling, Jan AU - Schumacher, Stefan AU - Aßmann, Marc ID - 42973 IS - 11 JF - Physical Review Letters KW - General Physics and Astronomy SN - 0031-9007 TI - Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography VL - 130 ER -