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Updated: Jun 4, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
A dual-mode microwave resonator for double electron-electron spin resonance spectroscopy at W-band microwave
Igor Tkach1, Giuseppe Sicoli, Claudia Höbartner
1Max Planck Institute for Biophysical Chemistry, Research Group Electron Paramagnetic Resonance, Göttingen, Germany. Igor.Tkach@mpibpc.mpg.de
Abstract:
We present a dual-mode resonator operating at/near 94 GHz (W-band) microwave frequencies and supporting two microwave modes with the same field polarization at the sample position. Numerical analysis shows that the frequencies of both modes as well as their frequency separation can be tuned in a broad range up to GHz. The resonator was constructed to perform pulsed ELDOR experiments with a variable separation of "pump" and "detection" frequencies up to Δν=350 MHz. To examine its performance, test ESE/PELDOR experiments were performed on a representative biradical system.
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