Multiple Tin-Vacancy Centers in Diamond with Nearly Identical Photon Frequency and Linewidth
Yasuyuki Narita, Peng Wang, Keita Ikeda, Kazuki Oba, Yoshiyuki Miyamoto, Takashi Taniguchi, Shinobu Onoda, Mutsuko Hatano, Takayuki Iwasaki
Abstract
Tin-vacancy (Sn-$V$) centers in diamond, which possess good optical and spin properties, are a promising system for constructing quantum network nodes. Tin atoms are heavy, though, and generating photons with identical wavelength and linewidth from multiple Sn-$V$ emitters is challenging, due to the strain in the diamond host material. This study shows that multiple Sn-$V$ centers, formed deep within bulk diamond by ion implantation and high-temperature annealing, emit nearly identical photons. This leads to two-photon interference from distant centers, an important step toward building quantum network nodes.