Flanigan, D., McCarrick, H., Jones, G., Johnson, B. R., Abitbol, M. H., Ade, Peter  ORCID: https://orcid.org/0000-0002-5127-0401, Araujo, D., Bradford, K., Cantor, R., Che, G., Day, P., Doyle, Simon ORCID: https://orcid.org/0000-0002-9054-986X, Kjellstrand, C. B., Leduc, H., Limon, M., Luu, V., Mauskopf, Philip ORCID: https://orcid.org/0000-0001-6397-5516, Miller, A., Mroczkowski, T., Tucker, Carole ORCID: https://orcid.org/0000-0002-1851-3918 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: | 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: | 24 Oct 2025 21:16 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/102444 |
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