High-temperature superconducting nanowires for photon detection
Journal article, 2015

The possible use of high-temperature superconductors (HTS) for realizing superconducting nanowire single-photon detectors is a challenging, but also promising, aim because of their ultrafast electron relaxation times and high operating temperatures. The state-of-the-art HTS nanowires with a 50-nm thickness and widths down to 130 nm have been fabricated and tested under a 1550-nm wavelength laser irradiation. Experimental results presenting both the amplitude and rise times of the photoresponse signals as a function of the normalized detector bias current, measured in a wide temperature range, are discussed. The presence of two distinct regimes in the photoresponse temperature dependence is clearly evidenced, indicating that there are two different response mechanisms responsible for the HTS photoresponse mechanisms.

High-temperature superconductivity

Yttrium barium copper oxide

Pulsed-laser deposition

Nanostructures and nanowires

Superconducting single-photon detectors

Optical photoresponse

Author

Riccardo Arpaia

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

M. Ejrnaes

Superconductors, oxides and other innovative materials and devices

L. Parlato

Universita degli Studi di Napoli Federico II

Superconductors, oxides and other innovative materials and devices

F. Tafuri

Università degli Studi della Campania Luigi Vanvitelli

Superconductors, oxides and other innovative materials and devices

R. Cristiano

Superconductors, oxides and other innovative materials and devices

D. Golubev

Aalto University

R. Sobolewski

Instytut Technologii Elektronowej

University of Rochester

Thilo Bauch

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Floriana Lombardi

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

G. P. Pepe

Superconductors, oxides and other innovative materials and devices

Universita degli Studi di Napoli Federico II

Physica C: Superconductivity and its Applications

0921-4534 (ISSN)

Vol. 509 16-21

Subject Categories

Physical Sciences

DOI

10.1016/j.physc.2014.09.017