Inverted pendulum state of a polariton Rabi oscillator

TL;DR

This paper explores a novel continuous-wave pumping scheme for polariton Rabi oscillations in semiconductor microcavities, revealing unique stationary states where polaritons accumulate at the upper branch, akin to a Kapitza pendulum.

Contribution

It introduces a new cw pumping approach and analyzes its effects, uncovering non-trivial stationary solutions in polariton Rabi oscillations.

Findings

Polariton accumulation at the upper branch under cw pumping.

Stationary solutions resemble a Kapitza pendulum.

Effects of exciton decay and photon leakage on system dynamics.

Abstract

Exciton-photon beats known as polariton Rabi oscillations in semiconductor microcavities are usually excited by short pulses of light. We consider a different pumping scheme, assuming a cw pumping of the Rabi oscillator from an exciton reservoir. We account for the initial pulse of light setting the phase, exciton decay due to exciton-phonon and exciton-exciton scattering, photon leakage, and blueshift of the exciton resonance due to interactions. We find non-trivial stationary solutions reminiscent of Kapitza pendulum, where polaritons are accumulated at the upper branch while the lower branch empties.