Electronic structure of the neutral silicon-vacancy center in diamond

Abstract

The neutrally-charged silicon vacancy in diamond is a promising system for quantum technologies that combines high-efficiency, broadband optical spin polarization with long spin lifetimes (T2 ~ 1 ms at 4 K) and up to 90% of optical emission into its 946 nm zero-phonon line. However, the electronic structure of SiV0 is poorly understood, making further exploitation difficult. Performing photoluminescence spectroscopy of SiV0 under uniaxial stress, we find the previous excited electronic structure of a single 3A1u state is incorrect, and identify instead a coupled 3Eu - 3A2u system, the lower state of which has forbidden optical emission at zero stress and so efficiently decreases the total emission of the defect: we propose a solution employing finite strain to form the basis of a spin-photon interface. Isotopic enrichment definitively assigns the 976 nm transition associated with the defect to a local mode of the silicon atom.

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• Quantum simulations of materials on near-term quantum computers
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• Entanglement of dark electron-nuclear spin defects in diamond
• Excited state properties of point defects in semiconductors and insulators investigated with time-dependent density functional theory
• Group III Quantum Defects in Diamond are Stable Spin-1 Color Centers
• First-principles Studies of Strongly Correlated States in Defect Spin Qubits in Diamond
• Single-Spin Readout and Quantum Sensing using Optomechanically Induced Transparency
• Doubly-charged silicon vacancy center, photochromism, and Si-N complexes in co-doped diamond
• Photo-induced charge state dynamics of the neutral and negatively charged silicon vacancy centers in room-temperature diamond
• Methods to Accelerate High-Throughput Screening of Atomic Qubit Candidates in van der Waals Materials
• GPU-Accelerated Solution of the Bethe-Salpeter Equation for Large and Heterogeneous Systems
• Quantum Nanophotonics with Group IV defects in Diamond
• Probing NV and SiV charge state dynamics using high-voltage nanosecond pulse and photoluminescence spectral analysis
• The $(e_g\otimes e_u)\otimes E_g$ product Jahn-Teller effect in the neutral group-IV--vacancy quantum bits in diamond
• Probing charge dynamics in diamond with an individual color center