Article
Chemistry, Multidisciplinary
Yago del Valle-Inclan Redondo, Christian Schneider, Sebastian Klembt, Sven Hoefling, Seigo Tarucha, Michael D. Fraser
Summary: We have created a rotating polariton condensate at gigahertz frequencies by off-resonantly pumping with a rotating optical stirrer composed of structured laser modes. The results show that the rotating polariton condensate acquires angular momentum exceeding the critical 1n/particle and demonstrates deterministic nucleation and capture of quantized vortices with a handedness controlled by the pump rotation direction. This study enables new opportunities for exploring open dissipative superfluidity, ordering of non-Hermitian quantized vortex matter, and topological states in a highly nonlinear, photonic platform.
Article
Physics, Multidisciplinary
Anton D. Putintsev, Kirsty E. Mcghee, Denis Sannikov, Anton V. Zasedatelev, Julian D. Topfer, Till Jessewitsch, Ullrich Scherf, David G. Lidzey, Pavlos G. Lagoudakis
Summary: Researchers have developed a new method for actively controlling the spatial properties of polariton condensates, independent of the excitation profile. This method allows for control over the spatial profile, density, and energy of polariton condensates at room temperature.
PHYSICAL REVIEW LETTERS
(2023)
Review
Physics, Applied
Alexey Kavokin, Timothy C. H. Liew, Christian Schneider, Pavlos G. Lagoudakis, Sebastian Klembt, Sven Hoefling
Summary: Polariton lasers emit coherent monochromatic light through a spontaneous emission process and show properties of Bose-Einstein condensation and superfluidity at room temperature. Emerging material systems for polariton lasers include organic molecules, transition metal dichalcogenides, perovskites, and liquid-crystal microcavities, which have potential applications in topological lasing, classical neuromorphic computing, and quantum information processing. Polaritonics, the study of strongly coupled light-matter states, offers advantages in classical and quantum information processing with full optical control and read-out capabilities.
NATURE REVIEWS PHYSICS
(2022)
Article
Physics, Multidisciplinary
Chen Hai-Jun, Ren Yuan, Wang Hua
Summary: Bessel optical lattice creates a non-spatially periodic optical lattice potential field, exhibiting characteristics of infinite deep potential well and ring-shaped potential well. This lattice has potential for realizing polariton condensate at room temperature with strong spin-orbit coupling, offering a new platform to study quantum physics.
ACTA PHYSICA SINICA
(2022)
Article
Physics, Multidisciplinary
Zhen-Xia Niu, Wei Zhang
Summary: In this study, a numerical analysis was conducted on the dynamical steady states of polariton Bose-Einstein condensates in an incoherent exciton reservoir driven by a ring-shaped optical pump. The balance between loss and gain of the polariton BEC resulted in a variety of steady states with different configurations, including topological defects such as vortex-antivortex pairs, vortices with a winding number, and solitons. The system became unstable under fast decay rates and small pumping ring, causing the BECs to no longer exist in the long-time limit. Additionally, it was confirmed that solitons were dynamically stable in this system, with a steady polariton current induced by repulsive interactions.
FRONTIERS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
Qi-wen Wang, Jin-ling Wang, Wen Wen, Ji Lin, Hui-jun Li
Summary: In this study, supersonic shock waves are generated and controlled in one-dimensional incoherent pumped exciton-polariton condensates. The region of existence of various shock waves is obtained by selecting a suitable initial wave and considering different parameters. The effects of gain, loss, non-adiabatic approximation, and reservoir diffusion coefficient on the shock wave profiles are discussed. The results indicate that the diffusion effect of the reservoir can clear small oscillations and tilt the platform between two waves, potentially paving the way for controlling shock waves in an incoherent pumped exciton-polariton system.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Kun Zhang, Wen Wen, Ji Lin, Hui-jun Li
Summary: The proposal introduces a method to generate and stabilize various nonlinear modes, such as dark, bright, dark-like, bright-like solitons, and vortices with m = 1 and m = 2, in a nonresonantly pumped exciton-polariton condensate by introducing spatially modulating pumping. Numerical simulations demonstrate that the balance between gain and loss can support the existence and stability of various nonlinear modes beyond just stable dark solitons in this scheme. This proposal may offer a pathway to generate, stabilize, and control nonlinear modes in the nonresonantly pumped exciton-polariton system.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Chen Li-Yuan, Gao Chao, Lin Ji, Li Hui-Jun
Summary: In this study, a PT symmetrical model is designed for the one-dimensional incoherent pumped exciton-polariton condensate system, and different types of solitons and their stability are investigated under weak and normal nonlinearity. The results contribute to the understanding of the competition between PT symmetrical potential and inhomogeneous pumping, and provide potential strategies for the application of the polariton condensate system in optical information processing.
ACTA PHYSICA SINICA
(2022)
Article
Nanoscience & Nanotechnology
Yao Li, Xuekai Ma, Zaharias Hatzopoulos, Pavlos G. Savvidis, Stefan Schumacher, Tingge Gao
Summary: This study demonstrates the existence of an exceptional point in an exciton polariton condensate in a double-well potential, and shows a simple way to optically manipulate the polariton condensation process by switching the condensate on and off near the exceptional point.
Article
Materials Science, Multidisciplinary
Edmond B. Madimabe, Conrad B. Tabi, Camus G. Latchio Tiofack, Timoleon C. Kofane
Summary: This paper demonstrates the existence of modulational instability in nonlinear exciton-polariton condensates. The growth rate expression is derived through linear stability analysis of continuous waves, and a parametric study of modulational instability is conducted. The results show that the photonic spin-orbit coupling and the pumping power have an impact on the growth rate spectrum.
Article
Optics
Krzysztof Tyszka, Magdalena Furman, Rafal Mirek, Mateusz Krol, Andrzej Opala, Bartlomiej Seredynski, Jan Suffczynski, Wojciech Pacuski, Michal Matuszewski, Jacek Szczytko, Barbara Pietka
Summary: This paper introduces a new approach to neuromorphic photonics using microcavities as building blocks of optical spiking neurons, and demonstrates its feasibility through experimental results. The research shows that exciton-polaritons exhibit characteristics similar to the Leaky Integrate-and-Fire (LIF) mechanism, enabling ultrafast processing on sub-ns timescales.
LASER & PHOTONICS REVIEWS
(2023)
Article
Physics, Multidisciplinary
Fabio Scafirimuto, Darius Urbonas, Michael A. Becker, Ullrich Scherf, Rainer F. Mahrt, Thilo Stoeferle
Summary: Microcavities with embedded optically active materials allow for the creation of exciton-polariton condensates in the regime of strong light-matter interaction. The authors demonstrate room temperature polariton condensation in a nano-fabricated two-dimensional Lieb lattice with an organic polymer. This study shows the potential for investigating extended topological polariton systems under ambient conditions.
COMMUNICATIONS PHYSICS
(2021)
Article
Physics, Condensed Matter
Ziyu Ye, Fei Chen, Hang Zhou, Song Luo, Fenghao Sun, Zheng Sun, Yuanlin Zheng, Xianfeng Chen, Huailiang Xu, Zhanghai Chen, Hui Li, Jian Wu
Summary: Based on ZnO microcavities with high quality factors, this study investigates the dynamics of polariton condensation under non-resonant excitation. The results reveal that the ultrafast dynamics of polariton condensation is sensitive to the polarization direction of the excitation pulses, which can be explained by the selective excitation of distinct exciton modes and the effective coupling strength of the excitation pulses in the ZnO microcavity.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Physics, Multidisciplinary
Kun Zhang, Wen Wen, Ji Lin, Hui-jun Li
Summary: We investigate the stability and controllability of one-dimensional bright and dark solitons, and two-dimensional bright solitons and vortices with different charges in a nonresonantly incoherent pumped exciton-polariton condensates. The introduction of a composite pumping can stabilize and modulate the profiles of these solitons. Our work demonstrates that the solitons obtained in this study are different from the ones in previous studies. This research may provide a way to modulate these solitons in the nonresonantly pumped exciton-polariton system.
FRONTIERS IN PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Tristan H. Harder, Oleg A. Egorov, Constantin Krause, Johannes Beierlein, Philipp Gagel, Monika Emmerling, Christian Schneider, Ulf Peschel, Sven Hoefling, Sebastian Klembt
Summary: This study demonstrates coupled microcavity implementations of Kagome lattices hosting exciton-polariton quantum fluids, allowing precise control over the dispersiveness of flatbands and selective condensation of exciton-polaritons into flatbands. The spatial and temporal coherence properties of laserlike emission from polariton condensates are closely related to the flatband nature of the system, leading to a significant increase in coherence time due to the localization of flatband condensates.
Article
Nanoscience & Nanotechnology
Philipp Gagel, Tristan H. Harder, Simon Betzold, Oleg A. Egorov, Johannes Beierlein, Holger Suchomel, Monika Emmerling, Adriana Wolf, Ulf Peschel, Sven Hoefling, Christian Schneider, Sebastian Klembt
Summary: Implementing concepts of topological protection in photonics has provided a new degree of freedom for photonic devices. In this work, arrays of coupled microresonators were used to achieve exciton-polariton lasing from a topological domain boundary defect. By manipulating doping levels and applying a bias voltage, control over the condensation behavior of polaritons in the topological mode was demonstrated. The ability to switch lasing between the topological defect and a trivial mode was also shown, suggesting the potential for ultrafast, topologically protected photonic switches at the single photon level.
Article
Physics, Applied
A. A. Maksimov, E. Filatov, I. I. Tartakovskii, V. D. Kulakovskii, S. G. Tikhodeev, C. Schneider, S. Hoefling
Summary: Engineering the chirality of optical microcavities is a central concept in modern photonics. We demonstrate a compact source of coherent radiation based on an electrically driven, chiral semiconductor microcavity. The device can produce circularly polarized light with polarization exceeding 90% and the direction of polarization can be controlled by the handedness of the chiral photonic crystal slab.
PHYSICAL REVIEW APPLIED
(2022)
Article
Optics
Lucas Bremer, Carlos Jimenez, Simon Thiele, Ksenia Weber, Tobias Huber, Sven Rodt, Alois Herkommer, Sven Burger, Sven Hoefling, Harald Giessen, Stephan Reitzenstein
Summary: We conducted extended numerical studies to optimize the photon extraction and fiber-coupling efficiency of nanoscale quantum dot single-photon sources, achieving an overall photon coupling efficiency of up to 83%. Our work provides objective comparability for different fiber-coupled single-photon sources and proposes optimized geometries for practical and highly efficient quantum dot single-photon sources.
Article
Optics
M. Pieczarka, D. Bieganska, C. Schneider, S. Hoefling, S. Klembt, G. Sek, M. Syperek
Summary: Optical trapping is an effective method for separating exciton-polariton condensates from an incoherent excitonic reservoir and improving their coherence. By comparing two experimental methods, it was found that ring-shaped excitation resulted in a two-threshold behavior, with exciton-polariton condensates appearing at the first threshold and photon lasing at the second threshold. This observation offers a way to achieve multiple phases of photonic condensates in samples, which is not possible with single spot excitation.
Article
Physics, Multidisciplinary
Donghai Li, Hangyong Shan, Christoph Rupprecht, Heiko Knopf, Kenji Watanabe, Takashi Taniguchi, Ying Qin, Sefaattin Tongay, Matthias Nuss, Sven Schroeder, Falk Eilenberger, Sven Hoefling, Christian Schneider, Tobias Brixner
Summary: In the exciton polariton system of transition-metal dichalcogenides, we establish a threefold coupling and investigate its spectral properties through experiments, revealing a rich multibranch structure that has not been observed before.
PHYSICAL REVIEW LETTERS
(2022)
Correction
Optics
A. Schlager, M. Goetsch, R. J. Chapman, S. Frick, H. Thiel, H. Suchomel, M. Kamp, S. Hoefling, C. Schneider, G. Weihs
Article
Optics
Nadav Landau, Dmitry Panna, Sebastian Brodbeck, Christian Schneider, Sven Hoefling, Alex Hayat
Summary: Two-photon absorption (TPA) allows light to access dark states of matter, which is important for quantum information processing. In a semiconductor microcavity, TPA-driven condensation of light-matter excitons can enable new solid-state quantum simulations and stimulate THz emission.
Article
Optics
Josephine Nauschuetz, Hedwig Knoetig, Robert Weih, Julian Scheuermann, Johannes Koeth, Sven Hoefling, Benedikt Schwarz
Summary: This article presents GaSb-based interband cascade lasers (ICLs) operating at a center wavelength of 6.12 μm in continuous-wave mode up to a maximum temperature of 40 °C. The performance of the devices is improved by adjusting the Ga1-xInxSb layer thickness in the active region to reduce valence intersubband absorption. The optimization of the device design and electron injector rebalances the electron and hole concentrations, resulting in low threshold current densities and power consumption, making them suitable for mobile and compact sensing systems.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Jonathan Jurkat, Sebastian Klembt, Marco De Gregorio, Moritz Meinecke, Quirin Buchinger, Tristan H. Harder, Johannes Beierlein, Oleg A. Egorov, Monika Emmerling, Constantin Krause, Christian Schneider, Tobias Huber-Loyola, Sven Hoefling
Summary: The introduction of topological physics to photonics has resulted in the development of robust photonic devices. While classical topological protection of light has been achieved, the utilization of quantum light sources in devices with topologically nontrivial resonances remains largely unexplored.
Article
Engineering, Electrical & Electronic
Nikolai B. Chichkov, Amit Yadav, Franck Joulain, Solenn Cozic, Semyon V. Smirnov, Leon Shterengas, Julian Scheuermann, Robert Weih, Johannes Koeth, Sven Hofling, Ulf Hinze, Samuel Poulain, Edik U. Rafailov
Summary: Building upon recent advances in GaSb-based diode lasers and Er-doped fluoride fibre technologies, this article demonstrates the fibre-based amplification of mid infrared diode lasers around 2.78 μm for the first time. The experimental results show output powers up to 0.9 W, pulse durations as short as 20 ns, and pulse repetition rates up to 1 MHz. Additionally, the impact of different fibre end-cap materials on laser performance is analyzed.
IEEE PHOTONICS JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Michael D. Fraser, H. Hoe Tan, Yago del Valle Inclan Redondo, Hima Kavuri, Elena A. Ostrovskaya, Christian Schneider, Sven Hoefling, Yoshihisa Yamamoto, Seigo Tarucha
Summary: The use of high energy proton implantation allows for precise and independent manipulation of both exciton and photon energies in GaAs microcavity exciton-polaritons. This technique involves post-growth proton implantation and annealing steps to induce small local interdiffusion, resulting in energy shifts in exciton or photon components. The polariton mode can be tuned by more than 10 meV, altering the effective mass for photon and exciton energy shifts, while maintaining narrow-linewidth polariton emission and condensation.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Physics, Applied
Quirin Buchinger, Simon Betzold, Sven Hoefling, Tobias Huber-Loyola
Summary: We conducted an optical study on various device designs of electrically contactable circular Bragg grating cavities in labyrinth geometries. In order to establish an electrical connection between the central disk and the surrounding membrane, we introduced connections between the adjacent rings separated by air gaps. By rotating these connections to create a labyrinth-like structure, we improved mode confinement, far-field pattern, and Purcell factor compared to layouts with connections arranged in straight lines. Reflectivity measurements and simulations were conducted to investigate the effects of different arrangements and sizes of connections on the optical properties and to determine the optimal design.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yago del Valle-Inclan Redondo, Christian Schneider, Sebastian Klembt, Sven Hoefling, Seigo Tarucha, Michael D. Fraser
Summary: We have created a rotating polariton condensate at gigahertz frequencies by off-resonantly pumping with a rotating optical stirrer composed of structured laser modes. The results show that the rotating polariton condensate acquires angular momentum exceeding the critical 1n/particle and demonstrates deterministic nucleation and capture of quantized vortices with a handedness controlled by the pump rotation direction. This study enables new opportunities for exploring open dissipative superfluidity, ordering of non-Hermitian quantized vortex matter, and topological states in a highly nonlinear, photonic platform.
Article
Physics, Multidisciplinary
Carolin Lueders, Matthias Pukrop, Franziska Barkhausen, Elena Rozas, Christian Schneider, Sven Hoefling, Jan Sperling, Stefan Schumacher, Marc Assmann
Summary: We have developed a novel phase-space method to dynamically monitor quantum coherence in polariton condensates. Our approach allows us to quantify complex decoherence mechanisms and provides a stable system for long-term coherence. By reconstructing phase-space functions from homodyne detection data, we have demonstrated the potential of using quantum coherence for information processing up to the nanosecond regime.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Edwin Ng, Tatsuhiro Onodera, Satoshi Kako, Peter L. McMahon, Hideo Mabuchi, Yoshihisa Yamamoto
Summary: This study explores the nonlinear stochastic dynamics of a measurement-feedback-based coherent Ising machine in the presence of quantum noise, demonstrating its potential to sample degenerate ground and low-energy spin configurations of the Ising model. A discrete-time Gaussian-state model of the machine is formulated to accurately capture the nonlinear dynamics above system threshold. Numerical simulations show that operating the machine in a quantum-noise-dominated regime can efficiently produce samples of low-energy Ising spin configurations.
PHYSICAL REVIEW RESEARCH
(2022)