Spectroscopic Investigations of Negatively Charged Tin-Vacancy Centres in Diamond

TL;DR

This paper provides a comprehensive spectroscopic analysis of negatively charged tin-vacancy centers in diamond, highlighting their potential for quantum information processing applications through detailed emission and stability studies.

Contribution

It offers the first detailed spectroscopic characterization of SnV- centers, including lifetime-limited linewidths and charge stability, advancing their potential use in quantum technologies.

Findings

Single photon emission with lifetime-limited linewidths at cryogenic temperatures

Stable charge state under resonant excitation demonstrated

Detailed analysis of phonon sideband and Debye-Waller factor

Abstract

The recently discovered negatively charged tin-vacancy centre in diamond is a promising candidate for applications in quantum information processing (QIP). We here present a detailed spectroscopic study encompassing single photon emission and polarisation properties, the temperature dependence of emission spectra as well as a detailed analysis of the phonon sideband and Debye-Waller factor. Using photoluminescence excitation spectroscopy (PLE) we probe an energetically higher lying excited state and prove fully lifetime limited linewidths of single emitters at cryogenic temperatures. For these emitters we also investigate the stability of the charge state under resonant excitation. These results provide a detailed insight into the spectroscopic properties of the $\text{SnV}^-$ centre and lay the foundation for further studies regarding its suitability in QIP.