Journal ArticleDOI
Exciton-polariton Bose-Einstein condensation
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In this article, the authors reviewed recent experiments and corresponding theoretical pictures based on the Gross-Pitaevskii equations and the Boltzmann kinetic simulations for a finite-size BEC of polaritons.Abstract:
In the past decade, a two-dimensional matter-light system called the microcavity exciton-polariton has emerged as a new promising candidate of Bose-Einstein condensation BEC in solids. Many pieces of important evidence of polariton BEC have been established recently in GaAs and CdTe microcavities at the liquid helium temperature, opening a door to rich many-body physics inaccessible in experiments before. Technological progress also made polariton BEC at room temperatures promising. In parallel with experimental progresses, theoretical frameworks and numerical simulations are developed, and our understanding of the system has greatly advanced. In this article, recent experiments and corresponding theoretical pictures based on the Gross-Pitaevskii equations and the Boltzmann kinetic simulations for a finite-size BEC of polaritons are reviewed.read more
Citations
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Photonics and optoelectronics of 2D semiconductor transition metal dichalcogenides
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Quantum fluids of light
Iacopo Carusotto,Cristiano Ciuti +1 more
TL;DR: In this paper, a review of recent theoretical and experimental advances in the fundamental understanding and active control of quantum fluids of light in nonlinear optical systems is presented, from the superfluid flow around a defect at low speeds to the appearance of a Mach-Cherenkov cone in a supersonic flow, to the hydrodynamic formation of topological excitations such as quantized vortices and dark solitons at the surface of large impenetrable obstacles.
Journal ArticleDOI
Electrical control of neutral and charged excitons in a monolayer semiconductor
Jason Ross,Sanfeng Wu,Hongyi Yu,Nirmal Ghimire,Nirmal Ghimire,Aaron M. Jones,Grant Aivazian,Jiaqiang Yan,Jiaqiang Yan,David Mandrus,David Mandrus,Di Xiao,Wang Yao,Xiaodong Xu +13 more
TL;DR: This work reports the unambiguous observation and electrostatic tunability of charging effects in positively charged, neutral and negatively charged excitons in field-effect transistors via photoluminescence and finds the charging energies for X(+) and X(-) to be nearly identical implying the same effective mass for electrons and holes.
a Quantum-Mechanical Theory of the Contribution of Excitons to the Complex Dielectric Constant of Crystals.
TL;DR: In this article, it was shown that the ordinary semiclassical theory of the absorption of light by exciton states is not completely satisfactory (in contrast to the case of absorption due to interband transitions).
Journal ArticleDOI
Strong light-matter coupling in two-dimensional atomic crystals
Xiaoze Liu,Xiaoze Liu,Tal Galfsky,Tal Galfsky,Zheng Sun,Zheng Sun,Fengnian Xia,Erh-chen Lin,Yi-Hsien Lee,Stéphane Kéna-Cohen,Vinod M. Menon,Vinod M. Menon +11 more
TL;DR: In this article, microcavity polaritons were observed in a dielectric cavity containing a monolayer of molybdenum disulphide at room temperature.
References
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Journal ArticleDOI
Observation of Bogoliubov excitations in exciton-polariton condensates
Shoko Utsunomiya,Shoko Utsunomiya,Shoko Utsunomiya,Lin Tian,Georgios Roumpos,C. W. Lai,C. W. Lai,Norio Kumada,Toshimasa Fujisawa,Makoto Kuwata-Gonokami,Andreas Löffler,Sven Höfling,Alfred Forchel,Yoshihisa Yamamoto,Yoshihisa Yamamoto,Yoshihisa Yamamoto +15 more
TL;DR: In this paper, the authors reported the first observation of interaction effects on the exciton-polariton condensate and the excitation spectra, which are in quantitative agreement with the Bogoliubov theory.
Journal ArticleDOI
A GaAs polariton light-emitting diode operating near room temperature
S. I. Tsintzos,N. T. Pelekanos,George Konstantinidis,Zacharias Hatzopoulos,Zacharias Hatzopoulos,Pavlos G. Savvidis +5 more
TL;DR: Experimental realization of an electrically pumped semiconductor polariton light-emitting device, which emits directly from polariton states at a temperature of 235 K, represents a substantial step towards the realization of ultra-efficient polaritonic devices with unprecedented characteristics.
Journal ArticleDOI
Definition of a laser threshold.
G. Bjork,G. Bjork,G. Bjork,Anders Karlsson,Anders Karlsson,Anders Karlsson,Yoshihisa Yamamoto,Yoshihisa Yamamoto,Yoshihisa Yamamoto +8 more
TL;DR: It is shown that in this regime the laser undergoes a transition from a linear (amplifier) behavior to a nonlinear (oscillatory) behavior at the proposed threshold pump rate, and the photon recycling resulting from the high spontaneous emission coupling efficiency and high absorption may result in lasing without population inversion.
Journal ArticleDOI
Finite temperature excitations in a dilute Bose-condensed gas
Hua Shi,Allan Griffin +1 more
TL;DR: In this article, the authors present a systematic account of several approximations for the Beliaev self-energies for a uniform dilute Bose gas at finite temperature.
Journal ArticleDOI
Exciton Bose condensation : the ground state of an electron-hole gas - I. Mean field description of a simplified model
C. Comte,P. Nozières +1 more
TL;DR: In this paper, an electron-hole gas in a simple model semiconductor, with direct gap and isotropic, non degenerate bands, was considered and the Bose condensed ground state of that system as a function of density, using a mean field variational ansatz.