TY  - JOUR
AU  - D. Henrich, L. Rehm S. Dörner
A2  - D. Henrich, L. Rehm S. Dörner, M. Hofherr, K. Il'in, A. Semenov, and M. Siegel
PY  - 2012
DA  - 2012//
TI  - Detection efficiency of a spiral-nanowire superconducting single-photon detector
KW  - Critical current
KW  - Nanoscale devices
KW  - Superconducting photodetectors.
AB  - We investigate the detection efficiency of a spiral layout of a Superconducting Nanowire Single-Photon Detector (SNSPD). The design is less susceptible to the critical current reduction in sharp turns of the nanowire than the conventional meander design. Detector samples with different nanowire width from 300 to 100 nm are patterned from a 4 nm thick NbN film deposited on sapphire substrates. The critical current IC at 4.2 K for spiral, meander, and simple bridge structures is measured and compared. On the 100 nm wide samples, the detection efficiency is measured in the wavelength range 400-1700 nm and the cut-off wavelength of the hot-spot plateau is determined. In the optical range, the spiral detector reaches a detection efficiency of 27.6%, which is ~1.5 times the value of the meander. In the infrared range the detection efficiency is more than doubled.
UR  - http://arxiv.org/abs/1210.3988
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=880), last updated on Wed, 05 Dec 2012 15:52:46 -0600
ID  - D.Henrich2012
ER  -