Article
Materials Science, Multidisciplinary
Fei Chen, Hang Zhou, Ziyu Ye, Song Luo, Zheng Sun, Yuanlin Zheng, Xianfeng Chen, Huailiang Xu, Hongxing Xu, Tim Byrnes, Hui Li, Zhanghai Chen, Jian Wu
Summary: This study visualizes the ultrafast buildup dynamics of room-temperature polariton condensation in a ZnO whispering gallery mode microcavity using the femtosecond angle-resolved spectroscopic imaging technique. The experimental observations are in quantitative agreement with the simulation results, which suggest that the scattering from exciton reservoir to lower polariton branches and the decay from these branches dominate the buildup process.
Article
Physics, Multidisciplinary
S. Baryshev, A. Zasedatelev, H. Sigurdsson, I Gnusov, J. D. Topfer, A. Askitopoulos, P. G. Lagoudakis
Summary: In this study, we conducted full polarization tomography on photon correlations in a spinor exciton-polariton condensate. Our measurements demonstrate the different forms of condensate pseudospin mean-field dynamics and their intrinsic relation to the condensate photon statistics.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
M. Knorr, J. M. Manceau, J. Mornhinweg, J. Nespolo, G. Biasiol, N. L. Tran, M. Malerba, P. Goulain, X. Lafosse, M. Jeannin, M. Stefinger, I Carusotto, C. Lange, R. Colombelli, R. Huber
Summary: The ultrafast scattering dynamics of intersubband polaritons in dispersive cavities embedding GaAs/AlGaAs quantum wells were directly studied using a noncollinear pump-probe geometry with phase-stable midinfrared pulses. Selective excitation of the lower polariton at a frequency of similar to 25 THz and at a finite in-plane momentum k(parallel to) resulted in the emergence of a narrowband maximum in the probe reflectivity at k(parallel to) = 0. A quantum mechanical model identified the underlying microscopic process as stimulated coherent polariton-polariton scattering.
PHYSICAL REVIEW LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Jiaxin Zhao, Antonio Fieramosca, Ruiqi Bao, Wei Du, Kevin Dini, Rui Su, Jiangang Feng, Yuan Luo, Daniele Sanvitto, Timothy C. H. Liew, Qihua Xiong
Summary: Researchers have observed nonlinear optical parametric polaritons in a WS2 monolayer microcavity, which opens up new possibilities for the development of all-optical valley polariton nonlinear devices.
NATURE NANOTECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Mengjie Wei, Wouter Verstraelen, Konstantinos Orfanakis, Arvydas Ruseckas, Timothy C. H. Liew, Ifor D. W. Samuel, Graham A. Turnbull, Hamid Ohadi
Summary: The authors demonstrate the on-the-fly reconfigurable optical trapping of organic polariton condensates, which are delocalized over a macroscopic distance from the excitation region. This study holds great potential for future research on polaritonic lattice physics.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
M. Pieczarka, O. Bleu, E. Estrecho, M. Wurdack, M. Steger, D. W. Snoke, K. West, L. N. Pfeiffer, A. G. Truscott, E. A. Ostrovskaya, J. Levinsen, M. M. Parish
Summary: The authors develop a generalized version of Bogoliubov theory for a driven-dissipative exciton-polariton condensate with a large incoherent uncondensed component. They argue that the presence of an excitonic reservoir modifies the energy and amplitudes of the Bogoliubov quasiparticle excitations. The authors support their theoretical findings with experimental results.
Article
Materials Science, Multidisciplinary
S. Mukherjee, V. K. Kozin, A. Nalitov, I. A. Shelykh, Z. Sun, D. M. Myers, B. Ozden, J. Beaumariage, M. Steger, L. N. Pfeiffer, K. West, D. W. Snoke
Summary: The study focused on the effect of pseudomagnetic field on a polariton condensate in a ring-shaped microcavity, resulting in a stable four-leaf pattern. The pattern was found to originate from the interaction of cavity potential, energy relaxation, and TE-TM splitting. Comparisons with the dissipative one-dimensional spinor Gross-Pitaevskii equation with the TE-TM splitting energy showed good qualitative agreement.
Article
Multidisciplinary Sciences
Jun Wang, Yutian Peng, Huawen Xu, Jiangang Feng, Yuqing Huang, Jinqi Wu, Timothy C. H. Liew, Qihua Xiong
Summary: Room-temperature Bose-Einstein condensation and quantized-vortex arrays are achieved and manipulated in a polaritonic kagome lattice, which serves as a promising optical analogue for simulating the formation of flat bands and vortical spin arrangements. By utilizing exciton-polariton quantum fluids of light in a frustrated kagome lattice, vortex lasing arrays are demonstrated and their configurations are modulated at room temperature. The findings provide a promising platform for studying quantum-fluid correlations in complex polaritonic lattices and highlight the feasible applications of structured light.
NATIONAL SCIENCE REVIEW
(2023)
Article
Materials Science, Multidisciplinary
Ekaterina Aladinskaia, Roman Cherbunin, Evgeny Sedov, Alexey Liubomirov, Kirill Kavokin, Evgeny Khramtsov, Mikhail Petrov, P. G. Savvidis, Alexey Kavokin
Summary: This study investigates the formation of exciton-polariton condensates in potlike traps created by optical pumping in a planar microcavity with embedded quantum wells. The experiment reveals the discrete spectrum of polariton eigenstates and demonstrates the control of these states through manipulating the shape and size of the trap and the spatial density distribution of the exciton reservoir.
Article
Optics
Aurelian Loirette-Pelous, Jean-Jacques Greffet
Summary: In this study, a new theoretical framework is built using established theoretical models and experimental results to explore the phenomena of photon Bose-Einstein condensation and photon thermalisation in semiconductors. The figures of merit for thermalisation and different experimental procedures are discussed. Finally, the fluctuations of the system and their relationship to different regimes are explored.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Anna M. Grudinina, Nina S. Voronova
Summary: This work theoretically analyzes the influence of bright and dark reservoir populations on the sound velocity of incoherently driven polaritons. The contribution of dark excitons is found to significantly lower the sound velocity and deviate it from the square-root-like behavior.
Article
Physics, Multidisciplinary
Davide Nigro, Vincenzo D'Ambrosio, Daniele Sanvitto, Dario Gerace
Summary: This paper introduces an integrated quantum logic device based on two-body polaritonic interaction, highlighting the quantum correlations of polaritons in low-density regime and their potential applications in quantum information processing and metrology.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Multidisciplinary
Jin-Ling Wang, Wen Wen, Ji Lin, Hui-Jun Li
Summary: We propose a scheme to generate and control supersonic shock waves in a non-resonantly incoherent pumped exciton-polariton condensate, and different types of shock waves can be generated by regulating the incoherent pump. The ranges of parameters about various shock waves are determined by the initial incidence function and the cross-interaction between the polariton condensate and the reservoir. Our proposal not only discusses the shock wave in the exciton-polariton condensate system with the repulsive self-interaction, but also finds the shock wave in the condensates system with attractive self-interaction.
CHINESE PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
D. W. Snoke, V. Hartwell, J. Beaumariage, S. Mukherjee, Y. Yoon, D. M. Myers, M. Steger, Z. Sun, K. A. Nelson, L. N. Pfeiffer
Summary: In this paper, a series of experiments on polariton-polariton interactions in GaAs/AlxGa1-xAs microcavity polariton structures are reviewed and compared, and an updated analysis of these experiments is presented. The results show that the energy shift of the spectral lines as well as measurements sensitive to the polariton scattering rate are important for calibrating the interaction parameter at low excitation density. The adjusted value of the interaction parameter is lower than previous reports but still higher than theoretically predicted.
Article
Optics
Samuel N. Alperin, Natalia G. Berloff
Summary: Researchers have found that the intrinsic particle flux in a photonic Bose-Einstein condensate can stabilize multiply charged vortex states and spontaneously form through dynamic symmetry breaking mechanisms during condensate formation. The vortex states are found to radiate acoustically at topologically quantized frequencies and are limited by a quantum Kelvin-Helmholtz instability. This represents a fundamental result in fluid dynamics for quantum photonic fluids.
Editorial Material
Physics, Applied
Christoph Becher, Sven Hoefling, Jin Liu, Peter Michler, Wolfram Pernice, Costanza Toninelli
APPLIED PHYSICS LETTERS
(2022)
Article
Multidisciplinary Sciences
Lukasz Dusanowski, Cornelius Nawrath, Simone L. Portalupi, Michael Jetter, Tobias Huber, Sebastian Klembt, Peter Michler, Sven Hoefling
Summary: This study demonstrates a solid-state spin-qubit platform based on a hole confined in a semiconductor quantum dot that emits telecom-band photons. The researchers showcase the control and manipulation of the hole, enabling its use in long-distance quantum communication. This work is significant for the development of solid-state quantum emitters compatible with existing optical fiber networks.
NATURE COMMUNICATIONS
(2022)
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
M. Burakowski, P. Mrowinski, M. Gawelczyk, J. P. Reithmaier, S. Hoefling, G. Sek
Summary: The properties of excitons, electrons, and holes in single InAs/InP asymmetric quantum dots were studied experimentally and theoretically, and it was found that they have high stability and potential for generating entangled photons.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Marcin Syperek, Raul Stuhler, Armando Consiglio, Pawel Holewa, Pawel Wyborski, Lukasz Dusanowski, Felix Reis, Sven Hofling, Ronny Thomale, Werner Hanke, Ralph Claessen, Domenico Di Sante, Christian Schneider
Summary: The optical spectroscopy of ultimately thin materials has greatly benefited our understanding of collective excitations in low-dimensional semiconductors. The authors of this study report the observation of room temperature excitons in a single layer of bismuth atoms epitaxially grown on a SiC substrate, a material with non-trivial global topology. These excitonic and topological physics arise from the same electronic structure.
NATURE COMMUNICATIONS
(2022)
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
Physics, Multidisciplinary
Norio Konno, Iwao Sato, Etsuo Segawa, Yutaka Shikano
Summary: We conducted a spectral analysis on the quantum walks on graph G and discussed their relation with cellular automata. Based on our research findings, we established the connection between the eigenvalues and eigenspaces of the quantum walks and those of the cellular automata, and demonstrated an application using the example of Grover walk.
QUANTUM STUDIES-MATHEMATICS AND FOUNDATIONS
(2023)
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)