Y-Ba-Cu-O nanostripes for optical photon detection

Giovanni Piero Pepe; L. Parlato; M. Ejrnaes; R. Cristiano; Riccardo Arpaia; F. Tafuri; D. Golubev; T. Bauch; Floriana Lombardi; R. Sobolewski

doi:10.1117/12.2179677

19 May 2015 Y-Ba-Cu-O nanostripes for optical photon detection

Giovanni Piero Pepe, L. Parlato, M. Ejrnaes, R. Cristiano, Riccardo Arpaia, F. Tafuri, D. Golubev, T. Bauch, Floriana Lombardi, R. Sobolewski

Author Affiliations +

Proceedings Volume 9504, Photon Counting Applications 2015; 950406 (2015) https://doi.org/10.1117/12.2179677
Event: SPIE Optics + Optoelectronics, 2015, Prague, Czech Republic

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.

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Giovanni Piero Pepe, L. Parlato, M. Ejrnaes, R. Cristiano, Riccardo Arpaia, F. Tafuri, D. Golubev, T. Bauch, Floriana Lombardi, and R. Sobolewski "Y-Ba-Cu-O nanostripes for optical photon detection", Proc. SPIE 9504, Photon Counting Applications 2015, 950406 (19 May 2015); https://doi.org/10.1117/12.2179677

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KEYWORDS

Superconductors

Nanostructures

Photodetectors

Laser optics

Absorption

Nanowires

Photonic nanostructures

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