Light-matter interaction in doped microcavities

TL;DR

This paper provides a theoretical analysis of light-matter interactions in doped microcavities with quantum wells, focusing on the high electron density regime and the resulting optical properties and eigenmodes.

Contribution

It extends the non-local dielectric response theory to analyze reflection, transmission, and eigenmodes in doped quantum well microcavities, considering the Mahan singularity.

Findings

Demonstrates the Mahan singularity in optical absorption due to Coulomb interactions

Calculates reflection and transmission spectra of the microcavity

Identifies new eigenmodes relevant for spectroscopy experiments

Abstract

We discuss theoretically the light-matter coupling in a microcavity containing a quantum well with a two-dimensional electron gas. The high density limit where the bound exciton states are absent is considered. The matrix element of interband optical absorbtion demonstrates the Mahan singularity due to strong Coulomb effect between the electrons and a photocreated hole. We extend the non-local dielectric response theory to calculate the quantum well reflection and transmission coefficients, as well as the microcavity transmission spectra. The new eigenmodes of the system are discussed. Their implications for the steady state and time resolved spectroscopy experiments are analyzed.