Photon correlation spectroscopy on a single quantum dot embedded in a nanowire

TL;DR

This paper demonstrates photon correlation spectroscopy on a single CdSe quantum dot in a ZnSe nanowire, revealing its potential as an efficient visible single-photon source with unique growth advantages.

Contribution

It introduces a new quantum dot system embedded in a nanowire and characterizes its photon emission dynamics using correlation spectroscopy.

Findings

Strong photoluminescence observed from the quantum dot.

Unambiguous identification of exciton, biexciton, and charged exciton lines.

The quantum dot acts as an efficient single-photon source in the visible spectrum.

Abstract

We have observed strong photoluminescence from a single CdSe quantum dot embedded in a ZnSe nanowire. Exciton, biexciton and charged exciton lines have been identified unambiguously using photon correlation spectroscopy. This technique has provided a detailed picture of the dynamics of this new system. This type of semi conducting quantum dot turns out to be a very efficient single photon source in the visible. Its particular growth technique opens new possibilities as compared to the usual self-asssembled quantum dots.