Optically detected spin-mechanical resonance in silicon carbide membranes
Optically detected spin-mechanical resonance in silicon carbide membranes
Poshakinskiy, A. V.; Astakhov, G.
Abstract
Hybrid spin-mechanical systems are a promising platform for future quantum technologies. Usually they require application of additional microwave fields to project integer spin to a readable state. We develop a theory of optically detected spin-mechanical resonance associated with half-integer spin defects in silicon carbide (SiC) membranes. It occurs when a spin resonance frequency matches a resonance frequency of a mechanical mode, resulting in a shortening of the spin relaxation time through enhanced spin-phonon coupling. The effect can be detected as an abrupt reduction of the photoluminescence intensity under optical pumping without application of microwave fields. We propose all-optical protocols based on such spin-mechanical resonance to detect external magnetic fields and mass with ultra-high sensitivity. We also discuss room-temperature nonlinear effects un- der strong optical pumping, including spin-mediated cooling and heating of mechanical modes. Our approach suggests a new concept for quantum sensing using spin-optomechanics.
Keywords: Quantum sensing; spin-mechanical systems; silicon carbide; point defects
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Physical Review B 100(2019), 094104
DOI: 10.1103/PhysRevB.100.094104
Cited 13 times in Scopus
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