A dual-mode microwave resonator for double electron-electron spin resonance spectroscopy at W-band microwave frequencies |
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Authors: | Tkach Igor Sicoli Giuseppe Höbartner Claudia Bennati Marina |
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Affiliation: | a Max Planck Institute for Biophysical Chemistry, Research Group Electron Paramagnetic Resonance, Am Faßberg 11, 37077 Göttingen, Germany;b Max Planck Institute for Biophysical Chemistry, Research Group Nucleic Acid Chemistry, Am Faßberg 11, 37077 Göttingen, Germany |
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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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Keywords: | Resonator Dual-mode EPR PELDOR DEER Microwave W-band |
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