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Analysis of microwave-readable RFTES bolometer

Merenkov, A. V.; Chichkov, V. I.; Ustinov, A. V.; Shitov, S. V.

We demonstrated and analyzed the smooth microwave-driven transition of a superconducting bridge made from Hf into its normal state at bath temperatures below the critical temperature of Hf (Tc ≈ 380 mK). The bridge is integrated on a silicon chip with both the 600-700 GHz double-slot antenna and the 1.5-GHz CPW quarter-wave resonator (Q-factor ~10⁴) made from 100-nm Nb film. The experimental bridge was sized 2.5 um by 2.5 um by 50 nm and tested at temperatures down to 50 mK. Similar to the technique of MKID, we measured the dependence of transmission S21 on microwave power at the bottom of the resonance curve. It was found that the microwave power absorbed in the bridge fits to the model of hot electron gas, P~Te⁶-Tph⁶. The internal NEP down to≈10¯¹⁸ W/√Hz is estimated due to thermal noise at the optimum electron gas temperature, Te ≈ 320 mK. The NEP can be scaled down below ≈10¯¹⁹ W/√Hz via reasonable reduction of the bridge volume. The new detector circuit is suitable for integration within a large imaging array exploiting the FDMreadout.

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Verlagsausgabe §
DOI: 10.5445/IR/1000095150
Veröffentlicht am 19.08.2019
DOI: 10.1088/1742-6596/1182/1/012009
Cover der Publikation
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 1742-6588, 1742-6596
KITopen-ID: 1000095150
Erschienen in Journal of physics / Conference Series
Verlag IOP Publishing
Band 1182
Heft 1
Seiten Art. Nr.: 012009
Bemerkung zur Veröffentlichung 13th Workshop on Low Temperature Electronics, WOLTE 2018; Sorrento; Italy; 10 September 2018 through 13 September 2018
Nachgewiesen in Scopus
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