Single-color, in situ photolithography marking of individual CdTe/ZnTe Quantum Dots containing a single Mn2+ ion

TL;DR

This paper introduces a simple in situ photolithography technique for permanently marking the positions of individual quantum dots at cryogenic temperatures, facilitating detailed magnetooptical studies.

Contribution

It presents a novel single-color, in situ marking method combined with micro-photoluminescence spectroscopy for quantum dots, enabling precise localization for subsequent analysis.

Findings

Successful marking of individual CdTe/ZnTe quantum dots containing Mn2+ ions.

Application of magnetic fields up to 10 T in different configurations.

Method applicable to various solid state nanoemitters.

Abstract

A simple, single-color method for permanent marking of the position of individual self-assembled semiconductor Quantum Dots (QDs) at cryogenic temperatures is reported. The method combines in situ photolithography with standard micro-photoluminescence spectroscopy. Its utility is proven by a systematic magnetooptical study of a single CdTe/ZnTe QD containing a Mn2+ ion, where a magnetic field of up to 10 T in two orthogonal, Faraday and Voigt, configurations is applied to the same QD. The presented approach can be applied to a wide range of solid state nanoemitters.