Inductive-detection electron-spin resonance spectroscopy with 65 spins/ Hz sensitivity

S. Probst (1) , A. Bienfait (1) , P. Campagne-Ibarcq (1) , J. J. Pla (2) , B. Albanese (1) , J. F. da Silva Barbosa (1) , T. Schenkel (3) , D. Vion (1) , D. Esteve (1) , K. Mølmer (4) , J. J. L. Morton (5) , R. Heeres (1) , P. Bertet (1)

1 QUANTRONICS - Quantronics Group
2 Yale University [New Haven]
3 LBNL - Lawrence Berkeley National Laboratory [Berkeley]
4 Department of Physics and Astronomy [Aarhus]
5 London Centre for Nanotechnology

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 para-metric amplifier. Owing to the small ∼10 −12 λ 3 magnetic resonator mode volume and to the low noise of the parametric amplifier, the spectrometer sensitivity reaches 260 ± 40 spins/echo and 65 ± 10 spins/ √ Hz, respectively.

Domaines: Instrumentations et Détecteurs [physics.ins-det]; Chimie théorique et/ou physique

S. Probst, A. Bienfait, P. Campagne-Ibarcq, J. J. Pla, B. Albanese, et al.. Inductive-detection electron-spin resonance spectroscopy with 65 spins/ Hz sensitivity. Applied Physics Letters, 2017, 111 (20), pp.202604. ⟨10.1063/1.5002540⟩. ⟨hal-01664352⟩