Polarization bistability and resultant spin rings in semiconductor microcavities

Bistability in Microcavities with Incoherent Optical or Electrical Excitation

We consider a quantum well embedded in a zero-dimensional microcavity with a sub-wavelength grated mirror, where the x-linearly polarized exciton mode is strongly coupled to the cavity photon, while y-polarized excitons remain in the weak coupling regime. Under incoherent optical or electric pumping, we demonstrate polariton bistability associated with parametric scattering processes. Such bistability is useful for constructing polaritonic devices with optical or electrical incoherent pumping.

The parametric oscillation threshold of semiconductor microcavities in the strong coupling regime

The threshold of triply resonant optical parametric oscillation in a semiconductor microcavity in the strong coupling regime is investigated. Because of the third-order nature of the excitonic nonlinearity, a variety of different behaviours is observed thanks to the interplay of parametric oscillation and optical bistability effects. The behaviour of the signal amplitude and of the quantum fluctuations in approaching the threshold has been characterized as a function of the pump, signal and idler frequencies.

半导体微腔中的极化激元-暗激子相互作用

Polariton-dark exciton interactions in bistable semiconductor microcavities

本研究利用半导体微腔中极化激元的双稳态特性，结合双光子激发技术，测量了下极化激元与暗激子间的相互作用强度，揭示了微小对称性破缺对极化激元凝聚体双稳态的影响。

Nonlinear Terahertz Emission in Semiconductor Microcavities

We consider the nonlinear terahertz emission by the system of cavity polaritons in the regime of polariton lasing. To account for the quantum nature of terahertz-polariton coupling we use the Lindblad master equation approach and demonstrate that quantum microcavities reveal rich variety of the nonlinear phenomena in terahertz range, including bistability, short THz pulse generation and THz switching.

Dissipative soliton protocols in semiconductor microcavities at finite temperatures

We consider exciton polaritons in a semiconductor microcavity with a saturable absorber in the growth direction of the heterostructure. This feature promotes additional nonlinear losses of the system with the emergence of bistability of the condensate particles number on the nonresonant (electrical or optical) excitation intensity. Further we demonstrate a new type of bright spatial dissipative exciton-polariton soliton which emerges in the equilibrium between the regions with different particle density. We develop protocols of soliton creation and destruction. The switch to a soliton-like beh…

受限极化激元暗孤子的可控双稳态与压缩

Controllable Bistability and Squeezing of Confined Polariton Dark Solitons

理论上研究了强耦合半导体微腔势阱中极化激元暗孤子的压缩光，通过调节势阱深度实现奇偶宇称孤子双稳态，在转折点附近获得可由Feshbach共振控制的强强度压缩。