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Y-Ba-Cu-O Nanostripes for Optical Photon Detection

G. P. Pepe ; L. Parlato ; M. Ejrnaes ; R. Cristiano ; Riccardo Arpaia (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; F. Tafuri ; D. Golubev ; Thilo Bauch (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Floriana Lombardi (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; R. Sobolewski
Photon Counting Applications 2015 (0277-786X). Vol. 9504 (2015),
[Konferensbidrag, refereegranskat]

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-mu m long and formed a meander structure, covering the area of up to 30x10 mu m(2) 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.

Nyckelord: Superconducting nanostripes, high-temperature superconductors, optical photoresponse, superconducting single-photon detectors



Denna post skapades 2015-07-17. Senast ändrad 2016-09-14.
CPL Pubid: 219790

 

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