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

Brien, Thomas, Ade, Peter ORCID: https://orcid.org/0000-0002-5127-0401, Barry, Peter, Dunscombe, Christopher, Leadley, D. R., Morozov, Dmitry, Myrononv, M., Parker, E. H. C, Prest, Martin, Prunnila, M., Sudiwala, Rashmikant ORCID: https://orcid.org/0000-0003-3240-5304, Whall, T. E. and Mauskopf, Philip ORCID: https://orcid.org/0000-0001-6397-5516 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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Abstract

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:	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:	17 Aug 2024 06:36
URI:	https://orca.cardiff.ac.uk/id/eprint/87723

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