Wavelength dependent electrical readout of spin ensembles in thin-film silicon carbide on insulator platform

Abstract: We report electrical spin state readout and coherent control of a small ensemble (<450) of silicon vacancies in a silicon carbide-on-insulator (SiCOI) platform, with excitation wavelengths from 780 to 990 nm. Demonstrating for the first time spin state readout well beyond the zero phonon line of the V2 silicon vacancies. By implementing photoelectrical detection of magnetic resonance (PDMR) in thin-film SiCOI, we merge a scalable and optics-free spin readout technique together with a promising platform for scalable and CMOS-compatible integrated photonics. Furthermore, we provide a comparison of optical and electrical readout between bulk SiC and thin-film SiCOI, revealing that our thin-film processing has no significant effect on the bulk T2 time of ~ 7 microseconds. These results establish SiCOI as a versatile platform for not only integrated photonics but also electronic and spin-based devices for scalable quantum technologies over a wide range of excitation wavelengths.