Influence of the electron spin resonance saturation on the power sensitivity of cryogenic sapphire resonators

Here, we study the paramagnetic ions behavior in presence of a strong microwave electromagnetic field sustained inside a cryogenic sapphire whispering gallery mode resonator. The high frequency measurement resolution that can be now achieved by comparing two Cryogenic Sapphire Oscillators (CSOs) per...

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Bibliographic Details
Published in:Journal of applied physics 2014-08, Vol.116 (5)
Main Authors: Giordano, Vincent, Grop, Serge, Bourgeois, Pierre-Yves, Kersalé, Yann, Rubiola, Enrico
Format: Article
Language:English
Subjects:
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPARATIVE EVALUATIONS
CRYSTALS
ELECTROMAGNETIC FIELDS
Electron paramagnetic resonance
Electron spin
ELECTRON SPIN RESONANCE
Electrons
Engineering Sciences
FREQUENCY MEASUREMENT
IMPURITIES
IONS
Linearity
MICROWAVE RADIATION
OSCILLATORS
Other
PARAMAGNETISM
RESOLUTION
RESONATORS
SAPPHIRE
SATURATION
SENSITIVITY
Spin resonance
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Summary:Here, we study the paramagnetic ions behavior in presence of a strong microwave electromagnetic field sustained inside a cryogenic sapphire whispering gallery mode resonator. The high frequency measurement resolution that can be now achieved by comparing two Cryogenic Sapphire Oscillators (CSOs) permit to observe clearly the non-linearity of the resonator power sensitivity. These observations that, in turn, allow us to optimize the CSO operation are well explained by the electron spin resonance saturation of the paramagnetic impurities contained in the sapphire crystal.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4891685