All-optical initialization, readout, and coherent preparation of single silicon-vacancy spins in diamond

Abstract

The silicon-vacancy (${\mathrm{SiV}}^{-}$) color center in diamond has attracted attention due to its unique optical properties. It exhibits spectral stability and indistinguishability that facilitate efficient generation of photons capable of demonstrating quantum interference. Here we show high fidelity optical initialization and readout of electronic spin in a single ${\mathrm{SiV}}^{-}$ center with a spin relaxation time of $T_1=2.4\pm 0.2$ ms. Coherent population trapping (CPT) is used to demonstrate coherent preparation of dark superposition states with a spin coherence time of $T_2^{\star }=35\pm 3$ ns. This is fundamentally limited by orbital relaxation, and an understanding of this process opens the way to extend coherences by engineering interactions with phonons. These results establish the ${\mathrm{SiV}}^{-}$ center as a solid-state spin-photon interface.

9 pages, 8 figures

References in corpus (9)

• The Quantum Internet
• High-fidelity projective readout of a solid-state spin quantum register
• Indistinguishable photons from separated silicon-vacancy centers in diamond
• Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature
• Diamond Nanophotonics
• Coherent Population Trapping of Single Spins in Diamond Under Optical Excitation
• All-optical formation of coherent dark states of silicon-vacancy spins in diamond
• Deterministic coupling of a single silicon-vacancy color center to a photonic crystal cavity in diamond
• Coherent Population Trapping in Diamond N-V Centers at Zero Magnetic Field

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• Cavity quantum electrodynamics with color centers in diamond
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• Resonant optical spectroscopy and coherent control of Cr4+ spin ensembles in SiC and GaN
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• Coherent control of a strongly driven silicon vacancy optical transition in diamond
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• Dissipation-assisted preparation of steady spin-squeezed states of SiV centers
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• Optical control protocols for high-fidelity spin rotations of single SiV${}^{-}$ and SnV${}^{-}$ centers in diamond
• Band-gap-engineered spin-phonon, and spin-spin interactions with defect centers in diamond coupled to phononic crystals
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• High resolution imaging with anomalous saturated excitation
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• Top-down fabrication of high-uniformity nanodiamonds by self-assembled block copolymer masks