Article
Chemistry, Physical
Jared R. Williams, Nicolas Tancogne-Dejean, Carsten A. Ullrich
Summary: Time-dependent density-functional theory (TDDFT) is an efficient method for calculating optical spectra, providing insight into exciton dynamics by obtaining exciton wave functions and understanding the formation and dissociation of excitons in real time.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2021)
Article
Materials Science, Multidisciplinary
O. Bleu, J. Levinsen, M. M. Parish
Summary: The study investigates polariton quantum correlations in a coherently driven box cavity in the low driving regime, accounting for the polarization degree of freedom. Through an effective wave-function approach, analytical expressions for steady-state polarization-resolved polariton populations and second-order correlation functions are obtained, showing good agreement with numerical results. The results suggest that the dominant interaction in recent experiments on confined fiber-cavity polaritons may be between cross-polarized polaritons, characteristic of the polariton Feshbach resonance, and systems with large biexciton binding energies are promising platforms for realizing strong polariton antibunching.
Article
Optics
Jinqi Wu, Rui Su, Antonio Fieramosca, Sanjib Ghosh, Jiaxin Zhao, Timothy C. H. Liew, Qihua Xiong
Summary: This study reports a low-threshold on-chip perovskite polariton parametric oscillator, which utilizes polariton-polariton interactions to achieve a signal close to the ground state at room temperature. This polaritonic system combines photons with excitons, exhibiting enhanced optical nonlinearity for highly nonlinear operations with low power consumption.
ADVANCED PHOTONICS
(2021)
Article
Materials Science, Multidisciplinary
Y. -M. Robin Hu, Elena A. Ostrovskaya, Eliezer Estrecho
Summary: We theoretically investigate the dynamics of wave packets in a non-Hermitian, optically anisotropic exciton-polariton system and observe their self-acceleration and reshaping governed by their eigenenergies. The exciton-polariton wave packets tend to evolve into states with smaller decay rates, resulting in directional transport in real space. Pseudospin topological defects are also found on the imaginary Fermi arc. These dynamics can be observed experimentally in microcavities and other two-dimensional systems.
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
Chemistry, Multidisciplinary
Shan-Wen Cheng, Ding Xu, Haowen Su, James M. Baxter, Luke N. Holtzman, Kenji Watanabe, Takashi Taniguchi, James C. Hone, Katayun Barmak, Milan Delor
Summary: In this study, we use excitons in two-dimensional materials as sensors to achieve visible-light imaging of phonon polariton propagation in hexagonal boron nitride, and observe the phenomenon of co-propagation of excitons and phonon polaritons. This research provides a new method for high-precision imaging of polar excitations and a new mechanism for realizing ballistic exciton transport at room temperature.
Article
Materials Science, Multidisciplinary
Galbadrakh Dagvadorj, Michal Kulczykowski, Marzena H. Szymanska, Michal Matuszewski
Summary: The study reveals the existence of two critical points in the phase diagram of a two-dimensional driven-dissipative system of polaritons, corresponding to quasicondensation and a first-order phase transition from a nonuniform state to a uniform state. The first-order nature of the transition is evidenced by discontinuity in density and correlation length, as well as phase coexistence and metastability. Additionally, a Berezinskii-Kosterlitz-Thouless-like transition signature is observed in the nonuniform phase.
Article
Materials Science, Multidisciplinary
Andrew Salij, Roel Tempelaar
Summary: This study explores the interaction between chiral cavity photons and exciton polaritons in monolayer transition-metal dichalcogenides, revealing coherent mixing of valley polarization induced by polaritons and the lifting of degeneracy, allowing for wavelength-selective access to valley pseudospin.
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
Optics
Mikhail Mamaikin, Yik-Long Li, Enrico Ridente, Wei Ting Chen, Joon-Suh Park, Alexander Y. Zhu, Federico Capasso, Matthew Weidman, Martin Schultze, Ferenc Krausz, Nicholas Karpowicz
Summary: This study demonstrates an electro-optic sampling technique for direct measurement of electric field dynamics produced by photonic devices and sub-wavelength structures. The technique offers high-resolution spatiotemporal imaging and overcomes resolution limits by encoding broadband signals into narrowband images.
Article
Engineering, Marine
Xuewen Ma, Wenyang Duan, Limin Huang, Yichao Qin, Hongli Yin
Summary: This study proposes a long short-term memory wave prediction model (LSTM-WP model) based on deep learning, which can accurately predict the surface of short crest waves. The effects of predicted distance and lead steps on the prediction error are also discussed.
Article
Nanoscience & Nanotechnology
Naoki Ichiji, Yuka Otake, Atsushi Kubo
Summary: The spatiotemporal dynamics of a surface plasmon polariton wave packet interacting with a plasmonic nanocavity on a metal surface are studied. It is found that only the spectral component matching a specific energy level can continue propagating on the metal surface, leading to a spatial peak shift in the wave packet.
Article
Physics, Multidisciplinary
Alexis Paldou Yaya, Romuald Kamdem Tamwa, Guy Richard Kol
Summary: We demonstrate the presence of intermittent chaos during the condensation of exciton-polaritons by analyzing bifurcation diagrams and Lyapunov Exponents. Furthermore, we investigate the possibility of controlling chaos in the homogeneous solution by varying the chemical potential as the pump increases. The influence of the chemical potential in the stationary state is examined through stability analysis using the Routh-Hurwitz criterion. Additionally, we establish the existence of cnoidal waves and their stability in propagation through phase portraits and the concept of symmetry.
Article
Chemistry, Physical
G. Stephen Kocheril, Han-Wen Gao, Lai-Sheng Wang
Summary: We conducted a temperature-controlled photoelectron imaging study on SbO2-, which was produced from a laser vaporisation source and cooled in a cryogenic 3D Paul trap. We obtained vibrationally resolved photoelectron spectra for the ground state detachment transition and determined the bending frequencies for both SbO2 and SbO2-. Franck-Condon simulations allowed us to estimate the vibrational temperature of the trapped SbO2- anion. We also obtained a near-threshold spectrum of SbO2- at a photon energy of 3.4958 eV, revealing partially resolved rotational structure and providing an accurate measurement of the electron affinity of SbO2.
Article
Optics
Xiuping Zhang, You Li, Junyong Zhang
Summary: The multi-planar low-coherent diffraction imaging (LCDI) method proposed in this study utilizes negative lenses as filters and an algorithm to reconstruct multi-planar diffraction patterns under low-coherence light sources, demonstrating effective phase and wavefront measurements with high accuracy and resolution.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Physics, Applied
Marcin Muszynski, Mateusz Krol, Katarzyna Rechcinska, Przemyslaw Oliwa, Mateusz Kedziora, Karolina Lempicka-Mirek, Rafal Mazur, Przemyslaw Morawiak, Wiktor Piecek, Przemyslaw Kula, Pavlos G. Lagoudakis, Barbara Pietka, Jacek Szczytko
Summary: In the presence of Rashba-Dresselhaus coupling, strong spin-orbit interactions in liquid-crystal optical cavities result in a distinctive spin-split entangled dispersion. Spin coherence between such modes gives rise to an optically persistent spin helix. In this paper, we introduce optical gain in such a system, by dispersing a molecular dye in a liquid-crystal microcavity, and demonstrate an optically persistent spin-helix lasing in the Rashba-Dresselhaus regime.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Multidisciplinary
Lipin Chen, Yoan Leger, Gabriel Loget, Mekan Piriyev, Imen Jadli, Sylvain Tricot, Tony Rohel, Rozenn Bernard, Alexandre Beck, Julie Le Pouliquen, Pascal Turban, Philippe Schieffer, Christophe Levallois, Bruno Fabre, Laurent Pedesseau, Jacky Even, Nicolas Bertru, Charles Cornet
Summary: The novel hybrid materials of bi-domain III-V/Si exhibit superior optical properties and efficient carrier collection capabilities, combining the excellent optical properties of semiconductors with the good transport characteristics of metallic materials, while also integrating the high efficiency and tunability of III-V inorganic bulk materials, as well as the flexible management of nano-scale charge carriers commonly found in organic blends.
Article
Chemistry, Multidisciplinary
Yiran Zhao, Julie Descamps, Soraya Ababou-Girard, Jean-Francois Bergamini, Lionel Santinacci, Yoan Leger, Neso Sojic, Gabriel Loget
Summary: This paper investigates the application of photoinduced electrochemiluminescence (PECL) in metal-insulator-semiconductor structures. By covering the surface of n-type silicon with a protective SiOx/metal layer, efficient PECL emission and spatial localization have been achieved. These findings are highly promising for future PECL applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Physics, Applied
R. Mirek, A. Opala, M. Furman, M. Krol, K. Tyszka, B. Seredynski, W. Pacuski, J. Suffczynski, J. Szczytko, M. Matuszewski, B. Pietka
Summary: This study demonstrates the utilization of time-delayed nonlinear effects in exciton polaritons to construct neural networks. Information is encoded in optical pulses arriving consecutively on the sample. The highly nonlinear effects are induced by time-dependent interactions with the excitonic reservoir, enabling the creation of a nonlinear XOR logic gate on a picosecond timescale. An optoelectronic neural network based on this logic gate achieves high accuracy in spoken digit classification.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Physical
Yiran Zhao, Julie Descamps, Brieg Le Corre, Yoan Leger, Alexander Kuhn, Neso Sojic, Gabriel Loget
Summary: This study investigates the application of photoinduced electrochemiluminescence (PECL) in designing anti-Stokes systems that convert infrared (IR) into visible light without direct electrical contact. By studying different types of Si-based closed bipolar electrodes (BPEs), it was found that bright and long-lasting emission can be triggered by external bias and IR illumination. The study also demonstrates the control of onset bias and anti-Stokes shift by the employed electrochemiluminescent (ECL) system.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Physics, Applied
A. Opala, R. Panico, V. Ardizzone, B. Pieta, J. Szczytko, D. Sanvitto, M. Matuszewski, D. Ballarini
Summary: This paper proposes and realizes an optical system where highly efficient backpropagation training can be applied through a set of highly nonlinear, nontunable nodes, demonstrating high classification accuracy.
PHYSICAL REVIEW APPLIED
(2022)
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
Multidisciplinary Sciences
M. Krol, I Septembre, P. Oliwa, M. Kedziora, K. Lempicka-Mirek, M. Muszynski, R. Mazur, P. Morawiak, W. Piecek, P. Kula, W. Bardyszewski, P. G. Lagoudakis, D. D. Solnyshkov, G. Malpuech, B. Pietka, J. Szczytko
Summary: The authors experimentally demonstrate the annihilation of exceptional points (EPs) from different Dirac points (valleys) by increasing non-Hermiticity in a liquid crystal microcavity platform. The platform utilizes voltage-controlled birefringence and TE-TM photonic spin-orbit-coupling, with non-Hermiticity provided by polarization-dependent losses. This study has significant implications for the field of non-Hermitian valley-physics.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Maximilien Billet, Luis Reis, Yoan Leger, Charles Cornet, Fabrice Raineri, Isabelle Sagnes, Konstantinos Pantzas, Gregoire Beaudoin, Gunther Roelkens, Francois Leo, Bart Kuyken
Summary: We demonstrate the transfer of gallium phosphide layers to an oxidized silicon wafer using micro-transfer printing, enabling versatile integration on an insulating substrate. Proof of concept is achieved with the fabrication of gallium phosphide-on-insulator ring resonators with high Q-factors up to 35,000.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Multidisciplinary Sciences
Karolina Lempicka-Mirek, Mateusz Krol, Helgi Sigurdsson, Adam Wincukiewicz, Przemyslaw Morawiak, Rafal Mazur, Marcin Muszynski, Wiktor Piecek, Przemyslaw Kula, Tomasz Stefaniuk, Maria Kaminska, Luisa De Marco, Pavlos G. Lagoudakis, Dario Ballarini, Daniele Sanvitto, Jacek Szczytko, Barbara Pietka
Summary: This research demonstrates the control of spin-orbit coupling in photons by electrically tuning the microcavity, as well as the integration of spinoptronic devices with electronics through electrical control of the light-matter coupling conditions and artificial gauge fields.
Article
Physics, Multidisciplinary
Pavel Kokhanchik, Dmitry Solnyshkov, Thilo Stoeferle, Barbara Pietka, Jacek Szczytko, Guillaume Malpuech
Summary: We theoretically demonstrate that Rashba-Dresselhaus spin-orbit coupling acts as a synthetic gauge field in lattices. This allows us to control the tunneling coefficients between sites and implement topological Hamiltonians and spin lattices useful for simulations and optimization. We propose a realistic scheme using liquid crystal-based microcavities to realize these concepts.
PHYSICAL REVIEW LETTERS
(2022)
Article
Energy & Fuels
Mekan Piriyev, Gabriel Loget, Yoan Leger, Lipin Chen, Antoine Letoublon, Tony Rohel, Christophe Levallois, Julie Le Pouliquen, Bruno Fabre, Nicolas Bertru, Charles Cornet
Summary: In this study, we investigated the performance of unprotected epitaxial GaAs/Si photoelectrodes during photocorrosion using structural, optical, and photoelectrochemical characterizations. We found that photoanodes consisting of a 1 μm thick GaAs epitaxially grown thin film on a low-cost Si substrate exhibited higher photocurrent than expensive commercial GaAs wafers. Through photoelectrochemical experiments under monochromatic excitation, we attributed the improved photocurrent to the dual-bandgap operation of the GaAs/Si photoelectrode, benefiting from both GaAs and Si photo-generated carriers. This finding opens up new possibilities for designing efficient and low-cost dual-bandgap photoelectrodes.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Optics
M. Furman, A. Opala, M. Krol, K. Tyszka, R. Mirek, M. Muszynski, B. Seredynski, W. Pacuski, J. Szczytko, M. Matuszewski, B. Pietka
Summary: Exciton-polaritons in optical cavities exhibit strong nonlinearities primarily due to third-order Kerr-like interactions mediated by the excitonic component. Under quasi-resonant excitation, this results in optical limiting or bistable behavior, characterized by hysteresis loops in input-output power characteristics. In this study, we demonstrate the inverted hysteresis direction in an exfoliated CdTe-based semiconductor microcavity, caused by the interplay of strong coupling suppression and the redshift of the lower polariton mode energy. We show that the polariton microcavity can be used as an optical limiter under these conditions, and all experimental observations are supported by a theoretical model.
Article
Physics, Multidisciplinary
Magdalena Furman, Rafal Mirek, Mateusz Krol, Wojciech Pacuski, Helgi Sigurosson, Jacek Szczytko, Barbara Pietka
Summary: Spatial modulation of light via magneto-optical control is inefficient due to the insensitivity of photons to external magnetic fields. In this study, the authors demonstrate a method to modulate the spatial properties of light by strong coupling between semimagnetic matter and light in microcavities. They achieve this by exciting adjacent exciton-polariton condensates, which synchronously switch into a higher order mode with opposite parity under a magnetic field. This finding paves the way for magnetic spatial modulation of nonlinear light.
COMMUNICATIONS PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yiran Zhao, Julie Descamps, Soraya Ababou-Girard, Jean-Francois Bergamini, Lionel Santinacci, Yoan Leger, Neso Sojic, Gabriel Loget
Summary: The study investigates a series of metal-insulator-semiconductor structures for upconversion PECL, demonstrating high photovoltages and record stabilities, with potential for future applications in intense PECL generation and spatially localized PECL.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
