|
|
Ferrari, S., Kovalyuk, V., Hartmann, W., Vetter, A., Kahl, O., Lee, C., et al. (2017). Hot-spot relaxation time current dependence in niobium nitride waveguide-integrated superconducting nanowire single-photon detectors. Opt. Express, 25(8), 8739–8750.
Abstract: We investigate how the bias current affects the hot-spot relaxation dynamics in niobium nitride. We use for this purpose a near-infrared pump-probe technique on a waveguide-integrated superconducting nanowire single-photon detector driven in the two-photon regime. We observe a strong increase in the picosecond relaxation time for higher bias currents. A minimum relaxation time of (22 +/- 1)ps is obtained when applying a bias current of 50% of the switching current at 1.7 K bath temperature. We also propose a practical approach to accurately estimate the photon detection regimes based on the reconstruction of the measured detector tomography at different bias currents and for different illumination conditions.
|
|
|
|
Blundell, R., Barrett, J., H. Gibson, C. G., Hunter, T., Kimberk, R., Leiker, S., et al. (2002). Prospects for terahertz radio astronomy from Northean Chile. In Harvard university (Ed.), Proc. 13th Int. Symp. Space Terahertz Technol. (pp. 159–166). Cambridge, MA, USA.
|
|
|
|
Baryshev, A., Lauria, E., Hesper, R., Zijlstra, T., & Wild, W. (2002). Fixed-tuned waveguide 0.6 THz SIS mixer with wide band IF. In Harward University (Ed.), Proc. 13th Int. Symp. Space Terahertz Technol. (pp. 1–9). Cambridge, MA, USA.
|
|
|
|
Stéphane Claude. (2003). Sideband-separating SIS mixer for ALMA band 7, 275–370 GHz. In Proc. 14th Int. Symp. Space Terahertz Technol. (41). Tucson, USA.
|
|
|
|
Grimes, P., Kittara, P., Yassin, G., Withington, S., & Jacobs, K. (2003). Investigation of the performance of a 700 GHz nline mixer. In Proc. 14th Int. Symp. Space Terahertz Technol. (247). Tucson, USA.
|
|
