Electron spin resonance spectroscopy with femtoliter detection volume
Ranjan, V, Probst, S, Albanese, B, Schenkel, T, Vion, D, Esteve, D, Morton, JJL, Bertet, P
2020UCL Discovery (University College London)49 citations
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
SpinsResonatorResonance (particle physics)Spin (aerodynamics)PhysicsSpectroscopyCoupling (piping)ElectronMaterials scienceNuclear magnetic resonanceAtomic physicsOptoelectronicsCondensed matter physicsQuantum mechanicsMetallurgyThermodynamicsMechanical and Optical ResonatorsAtomic and Subatomic Physics ResearchQuantum and electron transport phenomena