In situ amplification of spin echoes within a kinetic inductance parametric amplifier.

ABSTRACT: The use of superconducting microresonators together with quantum-limited Josephson parametric amplifiers has enhanced the sensitivity of pulsed electron spin resonance (ESR) measurements by more than four orders of magnitude. So far, the microwave resonators and amplifiers have been designed as separate components due to the incompatibility of Josephson junction-based devices with magnetic fields. This has produced complex spectrometers and raised technical barriers toward adoption of the technique. Here, we circumvent this issue by coupling an ensemble of spins directly to a weakly nonlinear and magnetic field-resilient superconducting microwave resonator. We perform pulsed ESR measurements with a 1-pL mode volume containing 6 × 10⁷ spins and amplify the resulting signals withi

SUBMITTER: Vine W 

PROVIDER: S-EPMC10005168 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature