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

## Author(s): Malissa, H; Schuster, DI; Tyryshkin, AM; Houck, Andrew A; Lyon, Stephen A

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 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 × 108 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. Publication Date: Feb-2013 Electronic Publication Date: Feb-2013 Citation: Malissa, H, Schuster, DI, Tyryshkin, AM, Houck, AA, Lyon, SA. (2013). Superconducting coplanar waveguide resonators for low temperature pulsed electron spin resonance spectroscopy. Review of Scientific Instruments, 84 (10.1063/1.4792205 DOI: doi:10.1063/1.4792205 Type of Material: Journal Article Journal/Proceeding Title: Review of Scientific Instruments Version: Author's manuscript