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Spin-Optical Dynamics and Quantum Efficiency of a Single V1 Center in Silicon Carbide
Kyoto Univ, Japan.
Univ Stuttgart, Germany; Univ Stuttgart, Germany.
Booz Allen Hamilton, VA 22102 USA.
Univ Stuttgart, Germany; Univ Stuttgart, Germany.
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2022 (English)In: Physical Review Applied, E-ISSN 2331-7019, Vol. 17, no 5, article id 054005Article in journal (Refereed) Published
Abstract [en]

Color centers in silicon carbide are emerging candidates for distributed spin-based quantum applications due to the scalability of host materials and the demonstration of integration into nanophotonic resonators. Recently, silicon vacancy centers in silicon carbide have been identified as a promising system with excellent spin and optical properties. Here, we fully study the spin-optical dynamics of the single silicon vacancy center at hexagonal lattice sites, namely V1, in 4H-polytype silicon carbide. By utilizing resonant and above-resonant sublifetime pulsed excitation, we determine spin-dependent excited-state lifetimes and intersystem-crossing rates. Our approach to inferring the intersystem-crossing rates is based on all-optical pulsed initialization and readout scheme, and is applicable to spin-active color centers with similar dynamics models. In addition, the optical transition dipole strength and the quantum efficiency of V1 defect are evaluated based on coherent optical Rabi measurement and local-field calibration employing electric field simulation. The measured rates well explain the results of spin-state polarization dynamics, and we further discuss the altered photoemission dynamics in resonant enhancement structures such as radiative lifetime shortening and Purcell enhancement. By providing a thorough description of the V1 center???s spin-optical dynamics, our work provides deep understanding of the system, which guides implementations of scalable quantum applications based on silicon vacancy centers in silicon carbide.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2022. Vol. 17, no 5, article id 054005
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URN: urn:nbn:se:liu:diva-185615DOI: 10.1103/PhysRevApplied.17.054005ISI: 000800211400002OAI: oai:DiVA.org:liu-185615DiVA, id: diva2:1666951
Note

Funding Agencies|EU-FET Flagship on Quantum Technologies through the project ASTERIQS [820394]; European Research Council (ERC); Max Planck Society; German Research Foundation [SPP 1601, FOR 2724]; EU-FET Flagship on Quantum Technologies through the project QIA [820445]; BadenWurttemberg Foundation [QT-6: SPOC, 3-4332.62-IAF/7]; German FederalMinistry of Education and Research (BMBF) [16KISQ008, 13N16219, 03ZU1110IB]; Swedish Energy Agency [43611-1]; Swedish Research Council [VR 2016-04068]; EU [862721]; Knut and Alice Wallenberg Foundation [KAW 2018.0071]; JSPS KAKENHI [20H00355]

Available from: 2022-06-09 Created: 2022-06-09 Last updated: 2022-06-09

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