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Jackson BD, Baryshev AM, de Lange G, Gao JR, Shitov SV, Iosad NN, et al. Low-noise 1 THz superconductor-insulator-superconductor mixer incorporating a NbTiN/SiO2/Al tuning circuit. Appl. Phys. Lett.. 2001;79(3):436.
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Baselmans JJA, Hajenius M, Gao JR, Klapwijk TM, de Korte PAJ, Voronov B, et al. Doubling of sensitivity and bandwidth in phonon cooled hot electron bolometer mixers. Appl Phys Lett. 2004;84(11):1958–60.
Abstract: We demonstrate that the performance of NbN lattice cooled hot electron bolometer mixers depends strongly on the interface quality between the bolometer and the contact structure. We show experimentally that both the receiver noise temperature and the gain bandwidth can be improved by more than a factor of 2 by cleaning the interface and adding an additional superconducting interlayer to the contact pad. Using this we obtain a double sideband receiver noise temperature TN,DSB=950 K
at 2.5 THz and 4.3 K, uncorrected for losses in the optics. At the same bias point, we obtain an IF gain bandwidth of 6 GHz.
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Dorenbos SN, Reiger EM, Perinetti U, Zwiller V, Zijlstra T, Klapwijk TM. Low noise superconducting single photon detectors on silicon. Appl Phys Lett. 2008;93(13):131101.
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Floet DW, Baselmans JJA, Klapwijk TM, Gao JR. Resistive transition of niobium superconducting hot-electron bolometer mixers. Appl Phys Lett. 1998;73(19):2826.
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Kooi JW, Baselmans JJA, Hajenius M, Gao JR, Klapwijk TM, Dieleman P, et al. IF impedance and mixer gain of NbN hot electron bolometers. J. Appl. Phys.. 2007;101(4):044511.
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