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Author Ozhegov, R. V.; Gorshkov, K. N.; Smirnov, K. V.; Gol’tsman, G. N.; Filippenko, L. V.; Koshelets, V. P.
Title Terahertz imaging system based on superconducting integrated receiver Type Conference Article
Year 2010 Publication Proc. 2-nd Int. Conf. Terahertz and Microwave radiation: Generation, Detection and Applications Abbreviated Journal Proc. 2-nd Int. Conf. Terahertz and Microwave radiation: Generation, Detection and Applications
Volume Issue Pages 20-22
Keywords SIS mixer, SIR
Abstract The development of terahertz imaging instruments for security systems is on the cutting edge of terahertz technology. We are developing a THz imaging system based on a superconducting integrated receiver (SIR). An SIR is a new type of heterodyne receiver based on an SIS mixer integrated with a flux-flow oscillator (FFO) and a harmonic mixer which is used for phase-locking the FFO. Developing an array of SIRs would allow obtaining amplitude and phase characteristics of incident radiation in the plane of the receiver. Employing an SIR in an imaging system means building an entirely new instrument with many advantages compare to traditional systems: i) high temperature resolution, comparable to the best results for incoherent receivers; ii) high spectral resolution allowing spectral analysis of various substances; iii) the local oscillator frequency can be varied to obtain images at different frequencies, effectively providing “color” images; iv) since a heterodyne receiver preserves the phase of the radiation, it is possible to construct 3D images. The paper presents a prototype THz imaging system using an 1 pixel SIR. We have studied the dependence of the noise equivalent temperature difference (NETD) on the integration time and also possible ways of achieving best possible sensitivity. An NETD of 13 mK was obtained with an integration time of 1 sec a detection bandwidth of 4 GHz at a local oscillator frequency of 520 GHz. An important advantage of an FFO is its wide operation range: 300-700 GHz.
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Call Number ozhegov2010terahertz Serial 1397
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Author Shytov, A. V.; Levitov, L. S.; Beenakker, C. W. J.
Title Electromechanical noise in a diffusive conductor Type Journal Article
Year 2002 Publication Phys. Rev. Lett. Abbreviated Journal Phys. Rev. Lett.
Volume 88 Issue 22 Pages
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Abstract Electrons moving in a conductor can transfer momentum to the lattice via collisions with impurities and boundaries, giving rise to a fluctuating mechanical stress tensor. The root-mean-squared momentum transfer per scattering event in a disordered metal (of dimension L greater than the mean free path l and screening length xi) is found to be reduced below the Fermi momentum by a factor of order l/L for shear fluctuations and (xi/L)^2 for pressure fluctuations. The excitation of an elastic bending mode by the shear fluctuations is estimated to fall within current experimental sensitivity for a nanomechanical oscillator.
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ISSN 0031-9007 ISBN Medium
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Notes Approved no
Call Number RPLAB @ s @ Serial 433
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Author Henry, Richard C.
Title Diffuse background radiation Type Journal Article
Year 1999 Publication Astrophys. J. Abbreviated Journal
Volume 516 Issue 2 Pages L49-L52
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ISSN 0004637X ISBN Medium
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Notes Approved no
Call Number Serial 434
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Author Dorenbos, S. N.; Reiger, E. M.; Perinetti, U.; Zwiller, V.; Zijlstra, T.; Klapwijk, T. M.
Title Low noise superconducting single photon detectors on silicon Type Journal Article
Year 2008 Publication Applied Physics Letters Abbreviated Journal Appl. Phys. Lett.
Volume 93 Issue 13 Pages 131101
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ISSN 0003-6951 ISBN Medium
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Notes Approved no
Call Number RPLAB @ s @ Serial 436
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Author Коган, Ш. М.; Лифшиц, Т. М.; Сидоров, В. И.
Title Рекомбинационное излучение в кремнии, стимулированное длинноволновым ИК-излучением Type Miscellaneous
Year 1965 Publication Abbreviated Journal
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Language russian Summary Language Original Title
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Notes Approved no
Call Number RPLAB @ s @ Serial 437
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