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Optical response of strained- and unstrained-silicon cold-electron bolometers

Brien, Thomas, Ade, Peter ORCID:, Barry, Peter, Dunscombe, Christopher, Leadley, D. R., Morozov, Dmitry, Myrononv, M., Parker, E. H. C, Prest, Martin, Prunnila, M., Sudiwala, Rashmikant ORCID:, Whall, T. E. and Mauskopf, Philip ORCID: 2016. Optical response of strained- and unstrained-silicon cold-electron bolometers. Journal of Low Temperature Physics 184 , pp. 231-237. 10.1007/s10909-016-1569-x

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We describe the optical characterisation of two silicon cold-electron bolometers each consisting of a small (32 × 14 µm) island of degenerately doped silicon with Superconducting aluminium contacts. Radiation is coupled into the silicon absorber with a twin-slot antenna designed to couple to 160-GHz radiation through a silicon lens.The first device has ahighly doped silicon absorber, the second has ahighly doped strained-silicon absorber. Using a novel method of cross-correlating the outputs from two parallel amplifiers, we measure noise-equivalent powers of 3.0×10−16 and 6.6×10^−17 W/rtHz for the control and strained device, respectively,when observing radiation from a 77-K source. In the case of the strained device, the noise-equivalent power is limited by the photon noise.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Publisher: Springer
ISSN: 0022-2291
Funders: EPSRC, STFC, Academy of Finland
Date of First Compliant Deposit: 30 March 2016
Date of Acceptance: 24 February 2016
Last Modified: 11 Oct 2023 18:55

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