Strong extinction of a far-field laser beam by a single quantum dot

TL;DR

This paper demonstrates a significant extinction of a laser beam by a single quantum dot using advanced lens techniques, enabling new spectroscopy methods without lock-in detection.

Contribution

It reports the first resonant laser transmission spectroscopy on a single quantum dot without phase-sensitive lock-in detection.

Findings

12% laser extinction achieved by a single quantum dot

First demonstration of resonant transmission spectroscopy without lock-in detection

Utilization of index-matched GaAs immersion lens techniques

Abstract

Through the utilization of index-matched GaAs immersion lens techniques we demonstrate a record extinction (12%) of a far-field focused laser by a single InAs/GaAs quantum dot. This contrast level enables us to report for the first time resonant laser transmission spectroscopy on a single InAs/GaAs quantum dot without the need for phase-sensitive lock-in detection.