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Tetsu Suzuki; Chris Mann; Takanari Yasui; Hirotomo Fujishima; Koji Mizuno |
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Title |
Quasi–integrated planar Schottky barrier diodes for 2.5 THz receivers |
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1998 |
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Proc. 9th Int. Symp. Space Terahertz Technol. |
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187 |
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RPLAB @ s @ schottky_Tn_24000_at_2p5THz |
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284 |
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Author |
Terai, Hirotaka; Miki, Shigehito; Yamashita, Taro; Makise, Kazumasa; Wang, Zhen |
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Title |
Demonstration of single-flux-quantum readout operation for superconducting single-photon detectors |
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2010 |
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Applied Physics Letters |
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Appl. Phys. Lett. |
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97 |
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11 |
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3 |
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SSPD |
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A readout circuit using superconducting single-flux-quantum (SFQ) circuits has been developed to realize an independently addressable array of superconducting single-photon detectors (SSPDs). We tested the SFQ readout circuits by connecting with SSPDs. The error rates of readout circuits were below 10–5 for input signal amplitude of greater than 18.2 μA. Detection efficiencies (DEs) for single-photon incidents were measured both with and without the connection of a readout circuit. The observed DEs traced almost the same curves regardless of the connection of the readout circuit, except that the SSPD is likely to latch by connecting the readout circuit. |
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RPLAB @ gujma @ |
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654 |
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Author |
Teich, M. C. |
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Chapter 9. Coherent detection in the infrared |
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1970 |
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361-407 |
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minimum detectable power, photon counter, photon counting, quantum counting, quantum limit |
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Academic Press Inc. |
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NY |
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Semiconductors and semimetals |
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5 |
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1059 |
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Teich, M. C. |
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Title |
Infrared heterodyne detection |
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1968 |
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Proc. IEEE |
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56 |
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1 |
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37-46 |
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minimum detectable power, quantum limit, infrared, IR mixer |
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Heterodyne experiments have been performed in the middle infrared region of the electromagnetic spectrum using the CO2laser as a radiation source. Theoretically optimum operation has been achieved at kHz heterodyne frequencies using photoconductive Ge:Cu detectors operated at 4°K, and at kHz and MHz frequencies using Pb1-xSnxSe photovoltaic detectors at 77°K. In accordance with the theory, the minimum detectable power observed is a factor of 2/η greater than the theoretically perfect quantum counter, hvΔf. The coefficient 2/η varies from 5 to 25 for the detectors investigated in this study. A comparison is made between photoconductive and photodiode detectors for heterodyne use in the infrared, and it is concluded that both are useful. Heterodyne detection at 10.6 µm is expected to be useful for communications applications, infrared radar, and heterodyne spectroscopy. It has particular significance because of the high radiation power available from the CO2laser, and because of the 8 to 14 µm atmospheric window. |
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IEEE |
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0018-9219 |
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1060 |
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Author |
Taylor, F.W. |
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Atmospheric physics: Natural lasers on Venus and Mars |
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1983 |
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Nature |
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Nature |
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306 |
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5944 |
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640-640 |
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0028-0836 |
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457 |
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