Nonlinear dynamics in a dipolariton cavity with a squeezed vacuum

Abstract

Dipolaritons are quasiparticles formed in double quantum wells’ microcavities driven by a coherent field. Here, we investigate the correlations and the quantum fluctuations in the light emitted by a dipolariton cavity pumped by a laser. By studying the noise spectrum in the strong and weak coupling regimes, we show that the squeezing generated by the direct and indirect excitonic nonlinearities is strongly enhanced by coupling the system to a squeezed vacuum. As a consequence, this coupling transforms the statistical light propriety from coherent to highly squeezed states, depending on the squeeze parameter strength. Furthermore, the squeezed reservoir stabilizes the nonclassical effect even with the high fluctuations caused by indirect exciton nonlinearity. It turns out that the combination of excitonic nonlinearities and squeezed vacuum is a good solution for producing stable and strong squeezing.

Unconventional Photon Blockade in Quantum‐Well Microcavities with Squeezed Light

“…[32][33][34][35] Particularly, semiconductor microcavities with quantum wells is a good example that have highly contributed to the exploration and the development of these materials. [36][37][38][39][40][41][42][43][44][45][46][47] In this specific structure, it is possible to confine electrons of the quantum well and the electromagnetic field. This confinement increases the mutual interactions of the two fields and permits to reach the strong coupling regime.…”

Quantum correlations and optical effects in a quantum-well cavity with a second-order nonlinearity

“…Based on double coupled quantum wells, this system gives rise to another hybrid quasiparticle called the dipolariton. Additional excitonic nonlinearities in the cavity enhance the degree of squeezing and considerably modify the quantum dynamics of the system, compared to polariton cavities [25][26][27][28][29][30].…”