Electron spin resonance spectroscopy with femtoliter detection volume
V. Ranjan, S. Probst, B. Albanese, T. Schenkel, D. Vion, D. Esteve, J. J. L. Morton, P. Bertet
Abstract
We report electron spin resonance measurements of donors in silicon at millikelvin temperatures using a superconducting LC planar micro-resonator and a Josephson parametric amplifier. The resonator includes a nanowire inductor, defining a femtoliter detection volume. Due to strain in the substrate, the donor resonance lines are heavily broadened. Single-spin to photon coupling strengths up to ∼3 kHz are observed. The single shot sensitivity is 120 ± 24 spins/Hahn echo, corresponding to ≈12±3 spins /Hz for repeated acquisition.
Topics & Concepts
SpinsResonatorMaterials scienceResonance (particle physics)SpectroscopyPlanarCoupling (piping)Electron paramagnetic resonancePulsed EPRSensitivity (control systems)Magnetic resonance force microscopyNuclear magnetic resonanceNanowireSiliconResonance fluorescenceElectronSpin (aerodynamics)OptoelectronicsAtomic physicsVolume (thermodynamics)PhotonAnalytical Chemistry (journal)SuperconductivityFerromagnetic resonanceSpin echoChemistryCondensed matter physicsMolecular physicsSuperconducting magnetMagnetic resonance microscopyShot noiseFree induction decayMechanical and Optical ResonatorsElectron Spin Resonance StudiesQuantum and electron transport phenomena