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Here I present my first fiber based coupled optical and EPR experimentsassociated to the development of a new SiC-YiG quantum sensor that I recentlytheoretically described (arXiv:1912.11634). This quantum sensor was designed toallow sub-nanoscale single external spin sensitivity optically detected pulsedelectron electron double resonance spectroscopy, using an X band pulsed EPRspectrometer, an optical fiber, and a photoluminescence setup. First keyexperiments before the demonstration of ODPELDOR spectroscopy are presentedhere. They were performed on a bulk 4H-SiC sample containing an ensemble ofresidual V2 color centers (spin S=3/2). Here I demonstrate i/ optical pumpingassisted pulsed EPR experiments, ii/ fiber based ODMR and optically detectedRABI oscillations, and iii/ optical pumping assisted PELDOR experiments, andiv/ some spin wave resonance experiments. Those experiments confirm thefeasability of the new quantum sensing approach proposed.

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