Broadband electron spin resonance from 500 MHz to 40 GHz using superconducting coplanar waveguides
We present non-conventional electron spin resonance (ESR) experiments based on
microfabricated superconducting Nb thin film waveguides. A very broad frequency range,
from 0.5 to 40 GHz, becomes accessible at low temperatures down to 1.6 K and in magnetic
fields up to 1.4 T. This allows for an accurate inspection of the ESR absorption position in the
frequency domain, in contrast to the more common observation as a function of magnetic
field. We demonstrate the applicability of frequency-swept ESR on Cr 3+ atoms in ruby as …
microfabricated superconducting Nb thin film waveguides. A very broad frequency range,
from 0.5 to 40 GHz, becomes accessible at low temperatures down to 1.6 K and in magnetic
fields up to 1.4 T. This allows for an accurate inspection of the ESR absorption position in the
frequency domain, in contrast to the more common observation as a function of magnetic
field. We demonstrate the applicability of frequency-swept ESR on Cr 3+ atoms in ruby as …
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