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arXiv · 1811.09941

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

Alison E. Rugar·Constantin Dory·Shuo Sun·Jelena Vučković
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Abstract

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. In this work we isolate single SnV$^{-}$ centers in diamond nanopillars and characterize their emission properties and their spin response to a magnetic field. We observe narrow emission linewidths that are spectrometer-limited, as well as a strong polarization dependence of each transition. We also find the Zeeman splitting under a magnetic field to be in good agreement with theoretical prediction. Our results pave the way toward future employment of single SnV$^{-}$s for optically accessible quantum memories.

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Alison E. Rugar, Constantin Dory, Shuo Sun, Jelena Vučković. 2019-04-29. Characterization of Optical and Spin Properties of Single Tin-Vacancy Centers in Diamond Nanopillars. https://doi.org/10.1103/physrevb.99.205417

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