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Electron spin resonance spectroscopy with femtoliter detection volume
- Author(s): Ranjan, V;
- Probst, S;
- Albanese, B;
- Schenkel, T;
- Vion, D;
- Esteve, D;
- Morton, JJL;
- Bertet, P
- et al.
Published Web Location
https://doi.org/10.1063/5.0004322Abstract
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.
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