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Goltsman GN. Ultrafast nanowire superconducting single-photon detector with photon number resolving capability. In: Arakawa Y, Sasaki M, Sotobayashi H, editors. Proc. SPIE. Vol 7236. SPIE; 2009. 72360D (1 to 11).
Abstract: In this paper we present a review of the state-of-the-art superconducting single-photon detector (SSPD), its characterization and applications. We also present here the next step in the development of SSPD, i.e. photon-number resolving SSPD which simultaneously features GHz counting rate. We have demonstrated resolution up to 4 photons with quantum efficiency of 2.5% and 300 ps response pulse duration providing very short dead time.
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Zhang W, Miao W, Zhong JQ, Shi SC, Hayton DJ, Vercruyssen N, et al. Temperature dependence of the receiver noise temperature and IF bandwidth of superconducting hot electron bolometer mixers. Supercond Sci Technol. 2014;27(8):085013 (1 to 5).
Abstract: In this paper we study the temperature dependence of the receiver noise temperature and IF noise bandwidth of superconducting hot electron bolometer (HEB) mixers. Three superconducting NbN HEB devices of different transition temperatures (Tc) are measured at 0.85 THz and 1.4 THz at different bath temperatures (Tbath) between 4 K and 9 K. Measurement results demonstrate that the receiver noise temperature of superconducting NbN HEB devices is nearly constant for Tbath/Tc, less than 0.8, which is consistent with the simulation based on a distributed hot-spot model. In addition, the IF noise bandwidth appears independent of Tbath/Tc, indicating the dominance of phonon cooling in the investigated HEB devices.
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Titova N, Gayduchenko IA, Moskotin MV, Fedorov GF, Goltsman GN. Carbon nanotube based terahertz radiation detectors. In: J. Phys.: Conf. Ser. Vol 1410.; 2019. 012208 (1 to 5).
Abstract: In this paper, we study terahertz detectors based on single quasimetallic carbon nanotubes (CNT) with asymmetric contacts and different metal pairs. We demonstrate that, depending on the contact metallization of the device, various detection mechanisms are manifested.
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Venediktov IO, Elezov MS, Prokhodtsov AI, Kovalyuk VV, An PP, Golikov AD, et al. Study of microheater’s phase modulation for on-chip Kennedy receiver. In: J. Phys.: Conf. Ser. Vol 1695.; 2020. 012117.
Abstract: In this work we describe phase modulators for several Mach-Zehnder interferometers (MZI) on silicon nitride platform for telecomm wavelength (1550 nm). We obtained current-voltage and phase-voltage curves for these modulators. MZI are needed for experimental realisation of various quantum receivers that can distinguish weak coherent states of light with extremely low error. Thermo-optical (TO) modulation is ensured by microheaters on one of the arms of MZI, which enables the change of the refractive index of the material with temperature. This approach allows to apply the necessary voltage to the golden microheaters to obtain the required phase change. For the on-chip microheaters we demonstrate the dependence of the phase shift on the voltage applied to our on-chip microheaters.
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Moskotin MV, Gayduchenko IA, Goltsman GN, Titova N, Voronov BM, Fedorov GF, et al. Bolometric effect for detection of sub-THz radiation with devices based on carbon nanotubes. In: J. Phys.: Conf. Ser. Vol 1124.; 2018. 051050 (1 to 5).
Abstract: In this work we investigate the response on THz radiation of a FET device based on an individual carbon nanotube conductance channel. It was already shown, that the response of such devices can be either of diode rectification origin or of thermoelectric effect origin or of their combination. In this work we demonstrate that at 77K and 8K temperatures strong bolometric effect also makes a significant contribution to the response.
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