Superconducting coplanar waveguide resonators for low temperature pulsed electron spin resonance spectroscopy

H Malissa; D I Schuster; A M Tyryshkin; A A Houck; S A Lyon

doi:10.1063/1.4792205

Superconducting coplanar waveguide resonators for low temperature pulsed electron spin resonance spectroscopy

Rev Sci Instrum. 2013 Feb;84(2):025116. doi: 10.1063/1.4792205.

Authors

H Malissa¹, D I Schuster, A M Tyryshkin, A A Houck, S A Lyon

Affiliation

¹ Department of Electrical Engineering, Princeton University, Olden Street, Princeton, New Jersey 08544, USA.

PMID: 23464260
DOI: 10.1063/1.4792205

Abstract

We discuss the design and implementation of thin film superconducting coplanar waveguide micro-resonators for pulsed electron spin resonance experiments. The performance of the resonators with P doped Si epilayer samples is compared to waveguide resonators under equivalent conditions. The high achievable filling factor even for small sized samples and the relatively high Q-factor result in a sensitivity of 4.5 × 10(8) spins per shot, which is superior to that of conventional waveguide resonators, in particular to spins close to the sample surface. The peak microwave power is on the order of a few milliwatts, which is compatible with measurements at ultra-low temperatures. We also discuss the effect of the nonuniform microwave magnetic field on the Hahn echo power dependence.