A ‘‘shunt’’ Fabry–Perot resonator for high-frequency electron spin resonance utilizing a variable coupling scheme
نویسندگان
چکیده
We report on the performance of a Fabry–Perot resonator for far-infrared electron spin resonance ~FIR-ESR! at 250 GHz designed to accommodate a thin, disk-shaped sample that must rest with its flat surface perpendicular to the incident FIR beam. This geometry minimizes dielectric losses, making it possible to obtain FIR-ESR spectra of aqueous or lossy samples with a macroscopic ordering, at canonical values of the director tilt of 0° and 90°. The resonator also utilizes an adjustable interferometer to achieve variable coupling in the FIR regime. © 1998 American Institute of Physics. @S0034-6748~98!01608-6#
منابع مشابه
Aqueous sample holders for high-frequency electron spin resonance
A quasioptical approach is utilized to design a resonator and sample holder for aqueous samples for high-frequency ~250 GHz! electron spin resonance ~ESR! spectroscopy. A disk shaped sample geometry was chosen to match the field contours of the fundamental mode in a Fabry–Perot resonator. A transmission-line analysis is used to determine the optimum sample geometry while taking into account dif...
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