TY  - JOUR
AU  - Zorin, M.
AU  - Milostnaya, I.
AU  - Gol'tsman, G. N.
AU  - Gershenzon, E. M.
PY  - 1997
DA  - 1997//
TI  - Fast NbN superconducting switch controlled by optical radiation
T2  - IEEE Trans. Appl. Supercond.
JO  - IEEE Trans. Appl. Supercond.
SP  - 3734
EP  - 3737
VL  - 7
IS  - 2
KW  - NbN superconducting switch
AB  - The switching time and the optical control power of the NbN superconducting switch have been measured. The device is based on the ultrathin film 5-8 nm thick patterned as a structure of several narrow parallel strips (/spl sim/1 /spl mu/m wide) connected to wide current leads. The current-voltage characteristic of the switch at temperature 4.2 K demonstrated a hysteresis due to DC current self-heating. We studied the superconducting-to-resistive state transition induced by both optical and bias-current excitations. The optical pulse duration was /spl sim/20 ps and the rise time of the current step was determined to be less than 50 ps. The optical pulse was delivered to the switch by the semiconductor laser through an optical fiber. We found that the measured switching time is less than the duration of the optical excitation. The threshold optical power density does not exceed 3/spl middot/10/sup 3/ W/cm/sup 2/. The proposed device can be used in the fiber input of LTS rapid single flux quantum circuits.
SN  - 1051-8223
UR  - http://ieeexplore.ieee.org/document/622230/
UR  - https://doi.org/10.1109/77.622230
DO  - 10.1109/77.622230
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1596), last updated on Tue, 25 May 2021 21:39:09 -0500
ID  - Zorin_etal1997
ER  -