학술논문
Inductive-detection electron-spin resonance spectroscopy with 65 spins/ Hz sensitivity
Document Type
article
Author
Source
Applied Physics Letters. 111(20)
Subject
Language
Abstract
We report electron spin resonance spectroscopy measurements performed at millikelvin temperatures in a custom-built spectrometer comprising a superconducting micro-resonator at 7 GHz and a Josephson parametric amplifier. Owing to the small (∼10-12λ3) magnetic resonator mode volume and to the low noise of the parametric amplifier, the spectrometer's single shot sensitivity reaches 260 ± 40 spins/echo translating into 65±10 spins/√Hz for repeated acquisition.