Hybrid nanophotonic-nanomagnonic SiC-YiG quantum sensor: II/ optical fiber based ODMR and OP-PELDOR experiments on bulk HPSI 4H-SiC

Abstract: Here I present my first fiber based coupled optical and EPR experiments associated to the development of a new SiC-YiG quantum sensor that I recently theoretically described (arXiv:1912.11634). This quantum sensor was designed to allow sub-nanoscale single external spin sensitivity optically detected pulsed electron electron double resonance spectroscopy, using an X band pulsed EPR spectrometer, an optical fiber, and a photoluminescence setup. First key experiments before the demonstration of ODPELDOR spectroscopy are presented here. They were performed on a bulk 4H-SiC sample containing an ensemble of residual V2 color centers (spin S=3/2). Here I demonstrate i/ optical pumping assisted pulsed EPR experiments, ii/ fiber based ODMR and optically detected RABI oscillations, and iii/ optical pumping assisted PELDOR experiments, and iv/ some spin wave resonance experiments. Those experiments confirm the feasability of the new quantum sensing approach proposed.