具有宇称-时间（PT）对称性的耦合激子-光子系统中的永久拉比振荡

Permanent Rabi oscillations in coupled exciton-photon systems with PT-symmetry.

作者信息

Chestnov Igor Yu, Demirchyan Sevak S, Alodjants Alexander P, Rubo Yuri G, Kavokin Alexey V

机构信息

Vladimir State University named after A. G. and N. G. Stoletovs, Department of Physics and Applied Mathematics, Vladimir, 600000, Russia.

ITMO University, St. Petersburg 197101, Russia.

出版信息

Sci Rep. 2016 Jan 21;6:19551. doi: 10.1038/srep19551.

DOI:10.1038/srep19551

PMID:26790534

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4726245/

Abstract

We propose a physical mechanism which enables permanent Rabi oscillations in driven-dissipative condensates of exciton-polaritons in semiconductor microcavities subjected to external magnetic fields. The method is based on stimulated scattering of excitons from the incoherent reservoir. We demonstrate that permanent non-decaying oscillations may appear due to the parity-time symmetry of the coupled exciton-photon system realized in a specific regime of pumping to the exciton state and depletion of the reservoir. At non-zero exciton-photon detuning, robust permanent Rabi oscillations occur with unequal amplitudes of exciton and photon components. Our predictions pave way to realization of integrated circuits based on exciton-polariton Rabi oscillators.

摘要

我们提出了一种物理机制，该机制能使处于外部磁场中的半导体微腔中激子-极化激元的驱动耗散凝聚体产生永久拉比振荡。该方法基于激子从非相干库的受激散射。我们证明，由于在向激子态泵浦和库耗尽的特定 regime 中实现的耦合激子-光子系统的宇称-时间对称性，可能会出现永久的非衰减振荡。在非零激子-光子失谐情况下，激子和光子分量的振幅不相等时会出现稳健的永久拉比振荡。我们的预测为基于激子-极化激元拉比振荡器的集成电路的实现铺平了道路。