Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 30: Superconductivity - Poster Session
TT 30.64: Poster
Montag, 31. März 2014, 15:00–19:00, P2
High-Tc YBCO nanowires for detector applications — •Steffen Koch1,2, Juliane Raasch2, Konstantin Ilin2, Bernhard Holzapfel3, Kazumasa Iida4, Marc Weber1, and Michael Siegel2 — 1Institute for Data Processing and Electronics, Karlsruhe Institute of Technology (KIT) — 2Institute of Micro- and Nanoelectronic Systems, KIT — 3Institute for Technical Physics, KIT — 4Leibniz Institute for Solid State and Materials Research Dresden, IFW Dresden
YBa2Cu3O7−d (YBCO) is a promising high-Tc material for the fabrication of superconducting detectors with ultimate sensitivity and ultra-fast response in a broad spectral range. Due to its intrinsic interaction times of less than 2 ps [1] the timing jitter of the response of superconducting YBCO nanowire single-photon detectors (SNSPD) should be smaller than in NbN SNSPDs.
The design of a SNSPD made from YBCO requires the patterning of meander lines with widths of the nanowire below 300 nm. The required thickness of the YBCO films ranges from a few nanometers for the absorption of optical photons up to several hundred nanometers in the X-ray range.
We will present results on the development of a technology for YBCO nanowires with thicknesses below 40 nm, widths of a few hundred nanometers and lengths up to tens of micrometres. The superconducting transport properties of different nanowire geometries measured with and without applying a magnetic field will be presented.
M. Lindgren et al., Appl. Phys. Lett. 74 , 853 (1999)