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
Anthonin Delphan, Maxim N. Makhonin, Tommi Isoniemi, Paul M. Walker, Maurice S. Skolnick, Dmitry N. Krizhanovskii, Dmitry V. Skryabin, Jean-Francois Carlin, Nicolas Grandjean, Raphael Butte
Summary: We observed polariton lasing in micro-ring resonators based on GaN/AlGaN slab waveguides in the UV spectral range, with stimulated polariton relaxation into multiple ring resonator modes. The strong exciton-photon coupling regime was confirmed by the reduction of the free spectral range and the blueshift of the exciton-like modes with increasing pulse energy. The absence of broadening in the exciton emission further confirmed lasing at low electron-hole densities. Overall, our work paves the way for the development of novel UV devices based on high-speed slab waveguide polariton geometry operating up to room temperature and integrated into complex photonic circuits.
Article
Physics, Multidisciplinary
Jiahui Huang, Wei Liu, Murat Can Sarihan, Xiang Cheng, Alessio Miranda, Benjamin Dwir, Alok Rudra, Eli Kapon, Chee Wei Wong
Summary: By optimizing the trade-off between cavity loss and QD spectral quality, we demonstrate a site-controlled QD-nanocavity system operating in the intermediate coupling regime with strong and weak coupling dynamically coexisting. We also reveal the pump power-dependent anti-bunching photon statistical dynamics and optical features of strongly confined exciton-polaritons and dark-exciton-like states in this coexisting strong-weak coupled system.
NEW JOURNAL OF PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Zijuan Li, Fengsheng Sun, Zebo Zheng, Jun Chen, Albert Davydov, Shaozhi Deng, Huairuo Zhang, Huanjun Chen, Fei Liu
Summary: The CsPbBr3 microsheets exhibit potential applications as subwavelength waveguides in integrated optics, with EP waveguide modes spanning a wide spectral region from visible to near-infrared. The EPs demonstrate a sufficient long propagation length and very low propagation loss, showcasing their promising optoelectronic properties for efficient light harvesting and guiding.
Article
Chemistry, Multidisciplinary
Chuan Tian, Linqi Chen, Yingjun Zhang, Liqing Zhu, Wenping Hu, Yichun Pan, Zheng Wang, Fangxin Zhang, Long Zhang, Hongxing Dong, Weihang Zhou
Summary: We observed coherent oscillations in the relaxation dynamics of an exciton-polariton condensate driven by parametric scattering processes. The high scattering efficiency of these parametric scatterings, due to the interbranch scattering scheme and nonlinear polariton-polariton interactions, leads to the fast depletion of the polariton condensate and periodic shut-off of the bosonic stimulation processes, resulting in relaxation oscillations. By employing polariton-reservoir interactions, the oscillation dynamics in the time domain can be projected onto the energy space.
Article
Nanoscience & Nanotechnology
Yaqi Wang, Huying Zheng, Ziying Tang, Runchen Wang, Xin Luo, Yan Shen, Xun Yang, Kai-Kai Liu, Shuangpeng Wang, Shaozhi Deng, Chong-Xin Shan, Hai Zhu
Summary: In this study, we report a chiral polariton laser achieved through spin-polarization of polariton condensation at room temperature. The chiral behavior of the microcavity breaks spatial inversion symmetry and lifts the energy degeneracy of polariton spin doublets by 11 meV. The polariton laser exhibits stable right-circular polarization due to bosonic condensation occurring only in low-energy spin-up polaritons.
Article
Physics, Condensed Matter
M. M. Mahmoodian, V. M. Kovalev, A. Chaplik
Summary: This study focuses on the electron energy relaxation in a hybrid structure of quantum dot interacting with a two-dimensional exciton gas in a Bose-Einstein condensate regime. A new relaxation mechanism is introduced and analyzed, revealing two microscopic processes of energy relaxation in the presence of BEC. It is found that the emission of two Bogoliubov excitations dominates the QD electron energy relaxation process.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
I. K. M. Reaz Rahman, Shiekh Zia Uddin, Matthew Yeh, Naoki Higashitarumizu, Jongchan Kim, Quanwei Li, Hyeonjun Lee, Kyuho Lee, Hoyeon Kim, Cheolmin Park, Jaehoon Lim, Joel W. Ager III, Ali Javey
Summary: In this study, a metal-oxide-semiconductor capacitor based on CdSe/CdS quantum dot thin films was used to investigate the influence of background charge on the luminescence efficiency and lifetime. By applying a gate voltage, the concentration ratio of charged and neutral quasiparticles in the quantum dots can be controlled, leading to modulation of the photoluminescence intensity and effective lifetime. The findings have potential applications in voltage-controlled electrochromics.
Article
Chemistry, Multidisciplinary
Daria D. Blach, Victoria A. Lumsargis, Daniel E. Clark, Chern Chuang, Kang Wang, Letian Dou, Richard D. Schaller, Jianshu Cao, Christina W. Li, Libai Huang
Summary: This study investigates the coherence of excitons in perovskite quantum dot solids by measuring the temperature-dependent photoluminescence line width and lifetime. The results show that excitons can coherently spread over three quantum dots in a superlattice, leading to superradiant emission. However, scattering from optical phonons causes the loss of coherence at higher temperatures, resulting in exciton localization to a single quantum dot. Static disorder and defects limit exciton coherence at low temperatures.
Article
Multidisciplinary Sciences
Satyendra Nath Gupta, Ora Bitton, Tomas Neuman, Ruben Esteban, Lev Chuntonov, Javier Aizpurua, Gilad Haran
Summary: Plasmonic cavities can confine electromagnetic radiation to deep sub-wavelength regimes, allowing for strong coupling phenomena with individual quantum emitters. By studying scattering spectra and using interferometry, researchers observed Rabi splitting and non-classical emission in devices with semiconductor quantum dots, revealing complex interactions between bright and dark states. Model simulations based on an extended Jaynes-Cummings Hamiltonian explained the experimental findings, highlighting the potential of controlling quantum state dynamics through the coupling of quantum emitters to plasmonic cavities.
NATURE COMMUNICATIONS
(2021)
Review
Quantum Science & Technology
HeeBong Yang, Na Young Kim
Summary: Microcavity exciton-polaritons are quantum quasi-particles resulting from strong light-matter coupling. They have attracted significant interest due to their potential applications in photonic devices and exploration of quantum phenomena. This review focuses on the spins and anisotropic interactions of microcavity exciton-polaritons, as well as the extraordinary quantum phenomena and novel spin-based photonic devices based on them.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Tomohiro Ishii, Fatima Bencheikh, Sebastien Forget, Sebastien Chenais, Benoit Heinrich, David Kreher, Lydia Sosa Vargas, Kiyoshi Miyata, Ken Onda, Takashi Fujihara, Stephane Kena-Cohen, Fabrice Mathevet, Chihaya Adachi
Summary: By controlling the orientation of organic molecules, the interaction between excitons and photons can be significantly enhanced, leading to a reduction in the condensation threshold of polariton BECs. This provides a promising strategy for realizing low-threshold polariton BEC systems and electrically driven polariton BECs.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Rahul Bhuyan, Maksim Lednev, Johannes Feist, Karl Borjesson
Summary: This study links the emission yield with the size of the exciton reservoir to investigate the photochemical effects of polaritons. The experimental control of the exciton reservoir allows for comparison and further research in the field of photophysics.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Physics, Multidisciplinary
Bjoern Schrinski, Anders S. Sorensen
Summary: Photons strongly coupled to material systems provide a new approach to realize nonlinear optics at the level of individual photons and study the dynamics of non-equilibrium quantum many-body systems. By using a simple physical polariton-picture, we can analytically describe the dynamics of photons coupled to a one-dimensional array of two-level atoms, including polariton scattering inside the medium and reflections of polaritons from the array's edge. We show that inelastic collisions, observed in small systems, also occur in infinite systems due to the existence of multiple bands in the dispersion relation. The developed theory serves as an effective field theory for studying nonlinear optics and many-body dynamics.
NEW JOURNAL OF PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Taek Joon Kim, Sang-hun Lee, Eunji Lee, Changwon Seo, Jeongyong Kim, Jinsoo Joo
Summary: In this study, the energy band alignments of a heterostructure consisting of MAPbI(3) perovskite sheets and CdSe-ZnS core-shell quantum dot layers were modulated, leading to the emission of far-red interlayer excitons. These excitons exhibited a longer lifetime and strong dipole alignment at the heterojunction. An abnormal behavior of the optical characteristics near the phase transition temperature of MAPbI(3) was observed. Photodetectors based on MAPbI(3)/CdSe-ZnS-QD heterostructures showed increased photocurrent and detectivity compared to MAPbI(3) under interlayer exciton excitation.
