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Proceedings Paper

Y-Ba-Cu-O nanostripes for optical photon detection
Author(s): Giovanni Piero Pepe; L. Parlato; M. Ejrnaes; R. Cristiano; Riccardo Arpaia; F. Tafuri; D. Golubev; T. Bauch; Floriana Lombardi; R. Sobolewski
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Paper Abstract

Nanowires of Y-Ba-Cu-O, with the thickness of 50 nm and the width ranging from 90 nm to 500 nm have been successfully grown on lanthanum aluminate substrates for photon detection experiments. The nanowires were up to 10- μm long and formed a meander structure, covering the area of up to 30×10 μm2 with a fill factor of 50%. The samples were excited using optical laser pulses at a 1550 nm wavelength and resulting photoresponse signals were measured as a function of both temperature and normalized bias current. Presence of two, distinct regimes in the photoresponse temperature dependence has been clearly evidenced, suggesting different physical mechanisms of the signal formation. Presented experimental results shed new light on prospects of implementation of high-temperature superconducting oxides in photon detection and counting.

Paper Details

Date Published: 19 May 2015
PDF: 4 pages
Proc. SPIE 9504, Photon Counting Applications 2015, 950406 (19 May 2015); doi: 10.1117/12.2179677
Show Author Affiliations
Giovanni Piero Pepe, Univ. degli Studi di Napoli Federico II (Italy)
CNR-SPIN UOS Naples (Italy)
L. Parlato, Univ. degli Studi di Napoli Federico II (Italy)
CNR-SPIN, UOS Naples (Italy)
M. Ejrnaes, CNR-SPIN, UOS Naples (Italy)
R. Cristiano, CNR-SPIN, UOS Naples (Italy)
Riccardo Arpaia, Chalmers Univ. of Technology (Sweden)
F. Tafuri, CNR-SPIN, UOS Naples (Italy)
Seconda Univ. di Napoli (Italy)
D. Golubev, Aalto Univ. School of Science (Finland)
T. Bauch, Chalmers Univ. of Technology (Sweden)
Floriana Lombardi, Chalmers Univ. of Technology (Sweden)
R. Sobolewski, Institute of Electron Technology (Poland)
Univ. of Rochester (United States)

Published in SPIE Proceedings Vol. 9504:
Photon Counting Applications 2015
Ivan Prochazka; Roman Sobolewski; Ralph B. James, Editor(s)

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