Permanent tuning of quantum dot transitions to degenerate microcavity resonances

TL;DR

This paper presents a permanent tuning method for aligning quantum dot transitions with microcavity resonances using laser-induced strain, advancing scalable solid-state quantum information applications.

Contribution

It introduces a novel permanent tuning technique combining isotropic and anisotropic tensile strain via laser-induced surface defects.

Findings

Achieved spectral resonance between quantum dots and microcavity modes.

Demonstrated permanent and precise tuning of quantum dot emission.

Enabled scalable integration for quantum information processing.

Abstract

We demonstrate a technique for achieving spectral resonance between a polarization-degenerate micropillar cavity mode and an embedded quantum dot transition. Our approach is based on a combination of isotropic and anisotropic tensile strain effected by laser-induced surface defects, thereby providing permanent tuning. Such a technique is a prerequisite for the implementation of scalable quantum information schemes based on solid-state cavity quantum electrodynamics.