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

doi:10.1109/TASC.2007.898648

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 journal › Article › Scientific › peer-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 language	English
Pages (from-to)	310-313
Journal	IEEE Transactions on Applied Superconductivity
Volume	17
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2007.898648
Publication status	Published - 2007
MoE publication type	A1 Journal article-refereed

Keywords

Passive imaging
Superconducting bolometers
THz

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10.1109/TASC.2007.898648

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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.",

keywords = "Passive imaging, Superconducting bolometers, THz",

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year = "2007",

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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

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

KW - Passive imaging

KW - Superconducting bolometers

KW - THz

U2 - 10.1109/TASC.2007.898648

DO - 10.1109/TASC.2007.898648

M3 - Article

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JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 2

ER -

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

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Keywords

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