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Kahl, O.; Ferrari, S.; Kovalyuk, V.; Goltsman, G. N.; Korneev, A.; Pernice, W. H. P. |
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Waveguide integrated superconducting single-photon detectors with high internal quantum efficiency at telecom wavelengths |
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Journal Article |
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2015 |
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Sci. Rep. |
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Sci. Rep. |
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5 |
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10941 (1 to 11) |
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optical waveguides; waveguide integrated SSPD; waveguide SSPD; nanophotonics |
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Superconducting nanowire single-photon detectors (SNSPDs) provide high efficiency for detecting individual photons while keeping dark counts and timing jitter minimal. Besides superior detection performance over a broad optical bandwidth, compatibility with an integrated optical platform is a crucial requirement for applications in emerging quantum photonic technologies. Here we present efficiencies close to unity at 1550nm wavelength. This allows for the SNSPDs to be operated at bias currents far below the critical current where unwanted dark count events reach milli-Hz levels while on-chip detection efficiencies above 70% are maintained. The measured dark count rates correspond to noiseequivalent powers in the 10–19W/Hz–1/2 range and the timing jitter is as low as 35ps. Our detectors are fully scalable and interface directly with waveguide-based optical platforms. |
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PMID:26061283; PMCID:PMC4462017 |
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RPLAB @ kovalyuk @ |
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946 |
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Goltsman, G. N.; Maliavkin, A. V.; Ptitsina, N. G.; Selevko, A. G. |
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Title |
Magnetic exciton spectroscopy in uniaxially compressed Ge at submillimeter waves |
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1986 |
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Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
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Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
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50 |
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280-281 |
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Ge, axial compression loads, excitons, germanium, magnetic spectroscopy, submillimeter waves, Zeeman effect |
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Russian |
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0367-6755 |
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3rd Vsesoiuznyi Seminar po Opticheskomu Detektirovaniiu Magnitnykh Rezonansov v Tverdykh Telakh, Kiev, Ukrainian SSR, May 1985 |
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1708 |
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Ozhegov, R. V.; Gorshkov, K. N.; Vachtomin, Y. B.; Smirnov, K. V.; Finkel, M. I.; Goltsman, G. N.; Kiselev, O. S.; Kinev, N. V.; Filippenko, L. V.; Koshelets, V. P. |
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Terahertz imaging system based on superconducting heterodyne integrated receiver |
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Conference Article |
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2014 |
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Proc. THz and Security Applications |
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Proc. THz and Security Applications |
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113-125 |
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SIS mixer, SIR, THz imaging |
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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. Employing an SIR in an imaging system means building an entirely new instrument with many advantages compared to traditional systems.
In this project we propose a prototype THz imaging system using an 1 pixel SIR and 2D scanner. At a local oscillator frequency of 500 GHz the best noise equivalent temperature difference (NETD) of the SIR is 10 mK at an integration time of 1 s and a detection bandwidth of 4 GHz. The scanner consists of two rotating flat mirrors placed in front of the antenna consisting of a spherical primary reflector and an aspherical secondary reflector. The diameter of the primary reflector is 0.3 m. The operating frequency of the imaging system is 600 GHz, the frame rate is 0.1 FPS, the scanning area is 0.5 × 0.5 m2, the image resolution is 50 × 50 pixels, the distance from an object to the scanner was 3 m. We have obtained THz images with a spatial resolution of 8 mm and a NETD of less than 2 K. |
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Springer Netherlands |
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Dordrecht |
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Corsi, C.; Sizov, F. |
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978-94-017-8828-1 |
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1368 |
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Zhang, W.; Miao, W.; Yao, Q. J.; Lin, Z. H.; Shi, S. C.; Gao, J. R.; Goltsman, G. N. |
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Spectral response and noise temperature of a 2.5 THz spiral antenna coupled NbN HEB mixer |
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2012 |
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Phys. Procedia |
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Phys. Procedia |
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36 |
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334-337 |
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NbN HEB mixer |
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We report on a 2.5 THz spiral antenna coupled NbN hot electron bolometer (HEB) mixers, fabricated with in-situ process. The receiver noise temperature with lowest value of 1180 K is in good agreement with calculated quantum efficiency factor as a function of bias voltage. In addition, the measured spectral response of the spiral antenna coupled NbN HEB mixer shows broad frequency coverage of 0.8-3 THz, and corrected response for optical losses, FTS, and coupling efficiency between antenna and bolometer falls with frequency due to diffraction-limited beam of lens/antenna combination. |
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1875-3892 |
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1381 |
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Palma, F.; Teppe, F.; Fatimy, A. E.; Green, R.; Xu, J.; Vachontin, Y.; Tredicucci, A.; Goltsman, G.; Knap, W. |
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THz communication system based on a THz quantum cascade laser and a hot electron bolometer |
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2010 |
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35th Int. Conf. Infrared, Millimeter, and Terahertz Waves |
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35th Int. Conf. Infrared, Millimeter, and Terahertz Waves |
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11623798 (1 to 2) |
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QCL, HEB detector |
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We present the experimental study of the direct emission – detection system based on the THz Quantum Cascade Laser as a source and Hot Electron Bolometer (HEB) detector – in view of its application as an optical communication system. We show that the system can efficiently transmit the QCL Terahertz pulses. We estimate the maximal modulation speed of the system to be about several GHz and show that it is limited only by the QCL pulse power supply, detector amplifier and connection line/wires parameters. |
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