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Photon noise from chaotic and coherent millimeter-wave sources measured with horn-coupled, aluminum lumped-element kinetic inductance detectors

Flanigan, D., McCarrick, H., Jones, G., Johnson, B. R., Abitbol, M. H., Ade, Peter, Araujo, D., Bradford, K., Cantor, R., Che, G., Day, P., Doyle, Simon, Kjellstrand, C. B., Leduc, H., Limon, M., Luu, V., Mauskopf, Philip, Miller, A., Mroczkowski, T., Tucker, Carole and Zmuidzinas, J. 2016. Photon noise from chaotic and coherent millimeter-wave sources measured with horn-coupled, aluminum lumped-element kinetic inductance detectors. Applied Physics Letters 108 (8) , 083504. 10.1063/1.4942804

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Abstract

We report photon-noise limited performance of horn-coupled, aluminum lumped-element kinetic inductance detectors at millimeter wavelengths. The detectors are illuminated by a millimeterwave source that uses an active multiplier chain to produce radiation between 140 and 160 GHz. We feed the multiplier with either amplified broadband noise or a continuous-wave tone from a microwave signal generator. We demonstrate that the detector response over a 40 dB range of source power is well-described by a simple model that considers the number of quasiparticles. The detector noise-equivalent power (NEP) is dominated by photon noise when the absorbed power is greater than approximately 1 pW, which corresponds to NEP � 2 � 10�17WHz�1=2, referenced to absorbed power. At higher source power levels, we observe the relationships between noise and power expected from the photon statistics of the source signal: NEP / P for broadband (chaotic) illumination and NEP / P1=2 for continuous-wave (coherent) illumination.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: AIP Publishing
ISSN: 00036951
Date of First Compliant Deposit: 14 July 2017
Date of Acceptance: 14 February 2016
Last Modified: 25 Feb 2019 22:25
URI: http://orca.cf.ac.uk/id/eprint/102444

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