In this study, novel use of the electromagnetic field profile of a localized spoof surface plasmonic mode to detect electron spin resonance is being reported. The mode is supported on a resonator with a complementary metallic spiral structure, etched on the ground plane of a microstrip line having a characteristic impedance of 50 Ω. The change in characteristics of the mode of interest with lowering of temperature has been observed and analyzed. Electron spin resonance spectra of a standard paramagnetic sample, 2,2-diphenyl-1-picrylhydrazyl, are recorded using this resonator down to 10 K. Potential application of the mode in the detection of microwave Rashba field-driven electron spin resonance has been discussed.
@article{arxiv.2101.11528,
title = {Detection of electron spin resonance down to 10 K using localized spoof surface plasmon},
author = {Subhadip Roy and Anuvab Nandi and Pronoy Das and Chiranjib Mitra},
journal= {arXiv preprint arXiv:2101.11528},
year = {2021}
}