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Baryshev, A.; Lauria, E.; Hesper, R.; Zijlstra, T.; Wild, W. |
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Fixed-tuned waveguide 0.6 THz SIS mixer with wide band IF |
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2002 |
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Proc. 13th Int. Symp. Space Terahertz Technol. |
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1-9 |
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Cambridge, MA, USA |
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Harward University |
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RPLAB @ s @ nt_SIS_136at0p65THz |
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328 |
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Verevkin, A.; Zhang, J.; Sobolewski, Roman; Lipatov, A.; Okunev, O.; Chulkova, G.; Korneev, A.; Smirnov, K.; Gol'tsman, G. N.; Semenov, A. |
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Title |
Detection efficiency of large-active-area NbN single-photon superconducting detectors in the ultraviolet to near-infrared range |
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Journal Article |
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2002 |
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Appl. Phys. Lett. |
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80 |
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25 |
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4687-4689 |
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NbN SSPD, SNSPD, QE |
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We report our studies on spectral sensitivity of meander-type, superconducting NbN thin-film single-photon detectors (SPDs), characterized by GHz counting rates of visible and near-infrared photons and negligible dark counts. Our SPDs exhibit experimentally determined quantum efficiencies ranging from ∼0.2% at the 1.55 μm wavelength to ∼70% at 0.4 μm. Spectral dependences of the detection efficiency (DE) at the 0.4 to 3.0-μm-wavelength range are presented. The exponential character of the DE dependence on wavelength, as well as its dependence versus bias current, is qualitatively explained in terms of superconducting fluctuations in our ultrathin, submicron-width superconducting stripes. The DE values of large-active-area NbN SPDs in the visible range are high enough for modern quantum communications. |
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331 |
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Ediss, G. A.; Koller, D. |
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68.5 to 118 GHz measurements of possible infrared filter materials: black polyethylene, Zitex, and grooved and un-grooved fluorogold and HDPE |
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Miscellaneous |
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2002 |
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ALMA Memo |
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412 |
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RPLAB @ s @ |
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446 |
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Zhou, Y.D.; Becker, C. R.; Ashokan, R.; Selamet, Y.; Chang, Y.; Boreiko, R. T.; Betz, A. L.; Sivananthan, S. |
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Progress in far-infrared detection technology |
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Conference Article |
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2002 |
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Proc. SPIE |
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4795 |
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121-128 |
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HgCdTe/CdTe, detector |
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II-VI intrinsic very long wavelength infrared (VLWIR, λc~20 to 50 μm) materials, HgCdTe alloys as well as HgCdTe/CdTe superlattices, were grown by molecular beam epitaxy (MBE). The layers were characterized by means of X-ray diffraction, conventional Fourier transform infrared spectroscopy, Hall effect measurements and transmittance electron microscopy (TEM). Photoconductor devices were processed and their spectral response was also measured to demonstrate their applicability in the VLWIR region. |
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Longshore, R. E.; Sivananthan, S. |
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Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series |
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471 |
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Colombelli, R |
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FIR quantum cascade lasers at λ>20 μm and THz emitters at λ=80 μm |
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2002 |
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Phys. E: Low-dimensional Systems and Nanostructures |
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13 |
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2-4 |
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848-853 |
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1386-9477 |
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483 |
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