Journal article
Electrical and optical properties of a bolometer with a suspended absorber and tunneling-current thermometers
- Abstract:
- We have developed a bolometer with a suspended normal-metal absorber connected to superconducting leads via tunneling barriers. Such an absorber has reduced heat losses to the substrate, which greatly increases the responsivity of the bolometer to over 109 V/W at 75 mK when measured by dc Joule heating of the absorber. For high-frequency experiments, the bolometers have been integrated in planar twin-slot and log-periodic antennas. At 300 GHz and 100 mK, the bolometer demonstrates the voltage and current response of 3 × 108 V/W and 1.1 × 104 A/W, respectively, corresponding to the quantum efficiency of ∼15 electrons per photon. An effective thermalization of electrons in the absorber favors the high quantum efficiency. We also report on how the in-plane- and transverse magnetic fields influence the device characteristics.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Version of record, pdf, 683.5KB, Terms of use)
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- Publisher copy:
- 10.1063/1.4986463
Authors
- Publisher:
- AIP Publishing
- Journal:
- Applied Physics Letters More from this journal
- Volume:
- 110
- Issue:
- 24
- Pages:
- 242601
- Publication date:
- 2017-06-15
- Acceptance date:
- 2017-05-31
- DOI:
- EISSN:
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1077-3118
- ISSN:
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0003-6951
- Pubs id:
-
pubs:700635
- UUID:
-
uuid:c8427346-86b3-4440-9413-a722dca10324
- Local pid:
-
pubs:700635
- Source identifiers:
-
700635
- Deposit date:
-
2017-06-15
Terms of use
- Copyright holder:
- © Tarasov, et al 2017
- Copyright date:
- 2017
- Notes:
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All article content, except
where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://
creativecommons.org/licenses/by/4.0/).
- Licence:
- CC Attribution (CC BY)
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