Abstract
GHz LC resonators whose resonance frequency depends on temperature may be put to use as radiation detectors. We have demonstrated that a resonator utilizing STO (SrTiO\(_{3}\)) at 4 and 2 K detected infrared light emitting diode (LED) light, by a shift of resonance frequency around 2 GHz. A suitable design of a resonator array with temperature-dependent dielectric material will be used as a large-format microcalorimeter array without or with only very small Johnson noise.
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Acknowledgments
The low-temperature HBT amplifier and room temperature amplifiers were supplied by Dr. D. Kojima at National Astronomical Observatory of Japan. This work is partially supported by Grants-in-Aid for Scientific Research (KAKENHI) from the JSPS, Nos. 20340068,21340046, and 25800112. N. Sekiya thanks the support by a Grant-in-Aid for JSPS Fellows No. 12J10673.
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Yamasaki, N.Y., Sekiya, N., Kikuchi, T. et al. Dielectric Resonators as Radiation Detectors at Low Temperatures. J Low Temp Phys 181, 59–67 (2015). https://doi.org/10.1007/s10909-015-1324-8
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DOI: https://doi.org/10.1007/s10909-015-1324-8