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18 April 2024 |
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Wide-Range Bolometer with RF Readout TES | | S.V. Shitov
; N. N. Abramov
; A. A. Kuzmin
; M. Merker
; M. Arndt
; S. H. Wuensch
; K. S. Ilin
; E. Erhan
; A. Ustinov
; M. Siegel
; | | Date: |
17 Dec 2014 | | Abstract: | To improve both scalability and noise-filtering capability of a
Transition-Edge Sensor (TES), a new concept of a thin-film detector is
suggested, which is based on embedding a microbridge TES into a high-Q planar
GHz range resonator weakly coupled to a 50 Ohm-readout transmission line. Such
a TES element is designed as a hot-electron microbolometer coupled to a THz
range antenna and as a load of the resonator at the same time. A weak THz
signal coupled to the antenna heats the microbridge TES, thus reducing the
quality factor of the resonator and leading to a power increment in the readout
line. The power-to-power conversion gain, an essential figure of merit, is
estimated to be above 10. To demonstrate the basic concept, we fabricated and
tested a few submicron sized devices from Nb thin films for operation
temperature about 5 K. The dc and rf characterization of the new device is made
at a resonator frequency about 5.8 GHz. A low-noise HEMT amplifier is used in
our TES experiments without the need for a SQUID readout. The optical
sensitivity to blackbody radiation within the frequency band 600-700 GHz is
measured as $sim3 imes 10^{-14} extrm W/sqrt{ extrm Hz}$ at Tc {approx}
5 K at bath temperature ~ 1.5 K. | | Source: | arXiv, 1412.5370 | | Services: | Forum | Review | PDF | Favorites | |
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