Double bosonic stimulation of THz emission in a polaritonic cascade laser

TL;DR

This paper proposes a novel bosonic cascade laser concept utilizing double bosonic stimulation to enhance THz emission, demonstrating threshold behavior and potential quantum efficiency exceeding unity.

Contribution

It introduces the concept of double bosonic stimulation in a polaritonic cascade laser for THz emission, showing its potential advantages and threshold characteristics.

Findings

Threshold-like behavior observed in the system

Cascade radiative transitions increase quantum efficiency

Interaction with reservoir affects threshold and efficiency

Abstract

We have considered a system of equidistant polaritonic states, interacting with an electromagnetic field of a localized THz cavity mode. An accumulation of photons in a THz cavity mode together with bosonic stimulation of the transition between polariton levels induces intensive radiative scattering of polaritons. The concept of double bosonic stimulation of a radiative transition in a bosonic cascade laser (BCL) is formulated, and the possibility of the use of a BCL for the emission of THz radiation is investigated. The system demonstrates threshold-like behaviour and, above threshold, cascade radiative transitions of polaritons which leads to an increase of quantum efficiency, which can exceed unity. The interaction of polaritons with a reservoir leads to an increase in the threshold pumping rate and a decrease of quantum efficiency.