Hybrid nanophotonic-nanomagnonic SiC-YiG quantum sensor: II/dark spins quantum sensing with V2 spins and fiber based OP-PELDOR/ODMR

Jérôme Tribollet

doi:10.1051/epjap/2020200063

Abstract

First experiments like optically detected (OD) electron paramagnetic resonance (ODMR), photoluminescence detected RABI oscillations, and optical pumping (OP) assisted pulsed EPR measurements of T2 and T1 of V2 spins in bulk SiC, which were previously demonstrated on various home build EPR spectrometers with free space optics, are here all demonstrated for the first time using a commercial X band pulsed EPR spectrometer combined with a single optical fiber and a standard external photoluminescence setup. Quantum sensing of bulk dark spins dipolar coupled to V2 spins in SiC is also demonstrated here for the first time using single fiber based OP assisted pulsed electron electron double resonance spectroscopy (PELDOR). A spin wave resonance study of model permalloy nanostripes is also presented allowing to check the ferromagnetic nanostripes design. These experiments are first key steps towards the fiber-based integration of the recently proposed SiC-YiG quantum sensor device [J. Tribollet, Eur. Phys. J. Appl. Phys. 90, 20102 (2020)], to a commercially available and worldwide used pulsed EPR spectrometer, with important applications expected in structural biology, surface chemistry, and quantum computing.

Highlights

I recently presented the theory [1] of a new SiC-YiG quantum sensor and the associated state of art optically detected pulsed double electron electron spin resonance spectroscopy (OD-pulsed electron electron double resonance spectroscopy (PELDOR)), allowing sub-nanoscale single external spin sensing
First experiments like optically detected (OD) electron paramagnetic resonance (ODMR), photoluminescence detected RABI oscillations, and optical pumping (OP) assisted pulsed Electron Paramagnetic Resonance (EPR) measurements of T2 and T1 of V2 spins in bulk SiC, which were previously demonstrated on various home build EPR spectrometers with free space optics, are here all demonstrated for the first time using a commercial X band pulsed EPR spectrometer combined with a single optical fiber and a standard external photoluminescence setup
They were investigated for example by standard inductively detected continuous wave EPR spectroscopy combined with free space optical pumping using a commercially available EPR spectrometer [9], or by sensitive photoluminescence detected Zero Field magnetic resonance spectroscopy (ZF-ODMR) [10], or by optically detected and optical pumping assisted pulsed magnetic resonance spectroscopy using home built pulsed EPR spectrometers combined with free space light pulse excitation and photoluminescence collection

Summary

Introduction

I recently presented the theory [1] of a new SiC-YiG quantum sensor and the associated state of art optically detected pulsed double electron electron spin resonance spectroscopy (OD-PELDOR), allowing sub-nanoscale single external spin sensing. I demonstrate this, using a commercial pulsed EPR/pulsed ELDOR X band spectrometer and an optical fiber This is a second key experiment towards the development of the new SiC-YiG quantum sensor and its related nanoscale ultra-sensitive ODPELDOR methodology, because PELDOR spectroscopy at two different microwave frequencies and single fiber based optical pumping are two key experimental tools to combine in this new proposed methodology [1]. I demonstrate in Figure 1 that the Electron Paramagnetic Resonance (EPR) rotational pattern of the V2 color centers spins in bulk 4H-SiC can be recorded, under optical pumping conditions with this experimental setup, allowing to check the zero field splitting and g factor of those paramagnetic centers [3–7], and to identify them This rotational pattern was obtained here at X band and room temperature, using cw EPR under continuous optical pumping with a 785 nm laser.

Hahn spin echo decay curve recorded on one transition of the

Conclusion