We report the narrow inhomogeneous distribution of the zero-phonon line from tin-vacancy (SnV) centers in diamond and the overlap of spectra from multiple separated SnV centers. Photoluminescence excitation spectroscopy measurements at a cryogenic temperature showed that SnV centers exhibit stable fluorescence and linewidths close to the Fourier transform-limited linewidth. The inhomogeneous distribution was as low as ~4 GHz, which enabled the observation of Sn isotope-dependent resonant frequencies. Owing to the narrow inhomogeneous distribution, we observed multiple SnV centers showing identical photons with almost the same wavelength and linewidth. Identical SnV centers were also observed even in different diamond samples, confirming the reliable fabrication of the high-quality SnV centers.
@article{arxiv.2208.06275,
title = {Identical Photons from Multiple Tin-Vacancy Centers in Diamond},
author = {Yasuyuki Narita and Peng Wang and Kazuki Oba and Yoshiyuki Miyamoto and Takashi Taniguchi and Shinobu Onoda and Mutsuko Hatano and Takayuki Iwasaki},
journal= {arXiv preprint arXiv:2208.06275},
year = {2022}
}