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Van Rudd, J., Johnson, J. L., & Mittleman, D. M. (2001). Cross-polarized angular emission patterns from lens-coupled terahertz antennas. J. Opt. Soc. Am. B, 18(10), 1524.
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van de Stadt, H. (1996). An improved 1 THz waveguide mixer. In Proc. 7th Int. Symp. Space Terahertz Technol. (536). Charlottesville, Virginia, USA.
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Vaks, V. L., Kurin, V. V., Pankratov, A. L., & Koshelets, V. P. (2005). Investigation of spectral properties of phase-focked flux flow oscillator. In ISEC (PD-04). Netherlands.
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Vakhtomin, Y. B., Finkel, M. I., Antipov, S. V., Smirnov, K. V., Kaurova, N. S., Drakinskii, V. N., et al. (2003). The gain bandwidth of mixers based on the electron heating effect in an ultrathin NbN film on a Si substrate with a buffer MgO layer. J. of communications technol. & electronics, 48(6), 671–675.
Abstract: Measurements of the intermediate frequency band 900 GHz of mixers based on the electron heating effect (EHE) in 2-nm- and 3.5-nm-thick superconducting NbN films sputtered on MgO and Si substrates with buffer MgO layers are presented. A 2-nm-thick superconducting NbN film with a critical temperature of 9.2 K has been obtained for the first time using a buffer MgO layer.
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Vahtomin, Y. B., Finkel, M. I., Antipov, S. V., Voronov, B. M., Smirnov, K. V., Kaurova, N. S., et al. (2002). Gain bandwidth of phonon-cooled HEB mixer made of NbN thin film with MgO buffer layer on Si. In Harvard university (Ed.), Proc. 13th Int. Symp. Space Terahertz Technol. (pp. 259–270). Cambridge, MA, USA.
Abstract: We present recently obtained values for gain bandwidth of NbN HEB mixers for different substrates and film thicknesses and for MgO buffer layer on Si at LO frequency of 0.85-1 THz. The maximal bandwidth, 5.2 GHz, was achieved for the device on MgO buffer layer on Si with a 2 nm thick NbN film. Functional devices based on NbN films of such thickness were fabricated for the first time due to an improvement of superconducting properties of NbN film deposited on MgO buffer layer on Si substrate.
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