Resonant tunneling of quantum dot in a microcavity

TL;DR

This paper proposes a method to measure the Purcell effect and observe exciton superradiance in quantum dots embedded in microcavities by analyzing electrical current changes.

Contribution

It introduces an electrical measurement approach to detect the Purcell effect and exciton superradiance in semiconductor quantum dots within microcavities.

Findings

Current varies with cavity length and exciton energy gap.

Purcell effect can be observed via electrical current measurements.

Superradiance of excitons may be detected electrically.

Abstract

We propose to measure Purcell effect by observing the current through a semeiconductor quantum dot embedded in a microcavity. An electron and a hole are injected separately into the quantum structure to form an exciton and then recombine radiatively. The stationary current is shown to be altered if one varies the cavity length or the exciton energy gap. Therefore, the Purcell effect can be observed experimentally by measuring the current through the quantum structure. In addition, we also find superradiance of excitons between quantum dots may also be observed in an electrical way.