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Updated: May 13, 2026
08:53
Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
Published on: October 9, 2012
Superconducting coplanar waveguide resonators for low temperature pulsed electron spin resonance spectroscopy
H Malissa1, D I Schuster, A M Tyryshkin
1Department of Electrical Engineering, Princeton University, Olden Street, Princeton, New Jersey 08544, USA.
The Review of Scientific Instruments
|March 8, 2013
Summary
We developed novel superconducting micro-resonators for electron spin resonance (ESR) experiments. These resonators offer superior sensitivity for detecting small spin ensembles, especially near surfaces.
Area of Science:
- Physics
- Materials Science
- Quantum Sensing
Background:
- Pulsed electron spin resonance (ESR) requires sensitive detection methods for small spin ensembles.
- Conventional waveguide resonators face limitations in sensitivity and sample size compatibility.
- Superconducting devices offer potential for enhanced performance in sensitive measurements.
Purpose of the Study:
- To design and implement thin film superconducting coplanar waveguide micro-resonators for pulsed ESR.
- To evaluate the performance of these micro-resonators using P-doped silicon epilayer samples.
- To compare their sensitivity and characteristics against conventional waveguide resonators.
Main Methods:
- Fabrication of thin film superconducting coplanar waveguide micro-resonators.
- Experimental setup for pulsed electron spin resonance measurements.
- Comparative analysis of resonator performance under equivalent conditions.
Main Results:
- Achieved a high filling factor even for small sample sizes.
- Demonstrated a high Q-factor, leading to a sensitivity of 4.5 × 10^8 spins per shot.
- Observed superior performance compared to conventional waveguide resonators, particularly for surface spins.
- Confirmed compatibility with ultra-low temperature measurements due to low peak microwave power (milliwatts).
Conclusions:
- Thin film superconducting coplanar waveguide micro-resonators represent a significant advancement for pulsed ESR.
- These resonators provide enhanced sensitivity and are suitable for small samples and surface spin detection.
- The design is compatible with ultra-low temperature experimental requirements.
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