Solid-state quantum emitters are an important platform for quantum information processing. The fabrication of the emitters with stable photon frequency and narrow linewidth is a fundamental issue, and it is essential to understand optical conditions under which the emitter keeps a bright charge state or transitions to a dark state. For these purposes, in this study, we investigate the spectral stability and charge state transition of tin-vacancy (SnV) centers in diamond. The photoluminescence excitation spectra of multiple SnV centers are basically stable over time with nearly transform-limited linewidths under resonant excitation, while simultaneous irradiation of resonant and non-resonant lasers makes spectra from the SnV centers unstable. We find that the instability occurs due to the charge state transition to a dark state. The charge state transition rates are quantitatively investigated depending on the laser powers. Lastly, with first-principle calculations, we model the charge state transition of the SnV center under the laser irradiation.
@article{arxiv.2412.07087,
title = {Charge state transition of spectrally stabilized tin-vacancy centers in diamond},
author = {Keita Ikeda and Yiyang Chen and Peng Wang and Yoshiyuki Miyamoto and Takashi Taniguchi and Shinobu Onoda and Mutsuko Hatano and Takayuki Iwasaki},
journal= {arXiv preprint arXiv:2412.07087},
year = {2024}
}