NbN vacuum bridge bolometer arrays with room temperature readout approaching photon noise limited THz imaging applications

Panu Helistö, Jari Penttilä, Hannu Sipola, Leif Grönberg, F. Maibaum, Arttu Luukanen, Heikki Seppä

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

We study the applicability of superconducting NbN vacuum bridge bolometer arrays with room temperature readout electronics to passive THz imaging applications. We show that sufficient bandwidth for video-rate mechanical scanning in terms of stability and noise can be reached by exploiting the divergences of the bolometer noise temperature and the differential impedance at the I - V curve minimum. Experimental electrical noise equivalent power is 9 fW/Hz1/2. This would correspond to ¡­10 times the photon noise in a bandwidth of 0.5 THz and is comparable to the expected clutter in passive THz images due to atmospheric fluctuations.
Original languageEnglish
Pages (from-to)310-313
JournalIEEE Transactions on Applied Superconductivity
Volume17
Issue number2
DOIs
Publication statusPublished - 2007
MoE publication typeA1 Journal article-refereed

Fingerprint

Bolometers
bolometers
readout
Photons
Vacuum
Bandwidth
Imaging techniques
vacuum
photons
room temperature
bandwidth
noise temperature
Electronic equipment
clutter
Scanning
Temperature
divergence
impedance
scanning
curves

Keywords

  • Passive imaging
  • Superconducting bolometers
  • THz

Cite this

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title = "NbN vacuum bridge bolometer arrays with room temperature readout approaching photon noise limited THz imaging applications",
abstract = "We study the applicability of superconducting NbN vacuum bridge bolometer arrays with room temperature readout electronics to passive THz imaging applications. We show that sufficient bandwidth for video-rate mechanical scanning in terms of stability and noise can be reached by exploiting the divergences of the bolometer noise temperature and the differential impedance at the I - V curve minimum. Experimental electrical noise equivalent power is 9 fW/Hz1/2. This would correspond to ¡­10 times the photon noise in a bandwidth of 0.5 THz and is comparable to the expected clutter in passive THz images due to atmospheric fluctuations.",
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NbN vacuum bridge bolometer arrays with room temperature readout approaching photon noise limited THz imaging applications. / Helistö, Panu; Penttilä, Jari; Sipola, Hannu; Grönberg, Leif; Maibaum, F.; Luukanen, Arttu; Seppä, Heikki.

In: IEEE Transactions on Applied Superconductivity, Vol. 17, No. 2, 2007, p. 310-313.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - NbN vacuum bridge bolometer arrays with room temperature readout approaching photon noise limited THz imaging applications

AU - Helistö, Panu

AU - Penttilä, Jari

AU - Sipola, Hannu

AU - Grönberg, Leif

AU - Maibaum, F.

AU - Luukanen, Arttu

AU - Seppä, Heikki

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KW - Passive imaging

KW - Superconducting bolometers

KW - THz

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DO - 10.1109/TASC.2007.898648

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