Characterization of Optical and Spin Properties of Single Tin-Vacancy Centers in Diamond Nanopillars

Understand

Color centers in diamond have attracted much interest as candidates for optically active, solid-state quantum bits.

• Of particular interest are inversion-symmetric color centers based on group-IV impurities in diamond because they emit strongly into their zero-phonon lines and are insensitive to electric field noise to first order.
• Early studies of the negatively-charged tin-vacancy (SnV$^{-}$) center in diamond have found the SnV$^{-}$ to be a promising candidate: it has high quantum efficiency, emits strongly into its zero-phonon lines, and is expected to have a long $T_2$ spin coherence time at 4~K.
• To develop the SnV$^{-}$ into a spin qubit requires further characterization, especially of the spin and optical properties of individual SnV$^{-}$ in nanofabricated structures.