http://www.cnr.it/ontology/cnr/individuo/prodotto/ID180981

NbN nanowire optical detectors for high speed applications (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

NbN nanowire optical detectors for high speed applications (Articolo in rivista) (literal)

Anno

2008-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1088/1742-6596/97/1/012264 (literal)

Alternative label

O. Quaranta; S. Pagano; M. Ejrnaes; C. Nappi; E. Pessina; F. Fontana (2008)
NbN nanowire optical detectors for high speed applications
in Journal of physics. Conference series (Print)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

O. Quaranta; S. Pagano; M. Ejrnaes; C. Nappi; E. Pessina; F. Fontana (literal)

Pagina inizio

012264 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

97 (literal)

Rivista

Journal of physics. Conference series (Rivista)

Note

Google S (literal)
ISI Web of Science (WOS) (literal)
Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Univ Salerno, Dipartimento Fis ER Caianiello, I-84081 Baronissi, SA, Italy; Istituto di Cibernetica \"E. Caianiello\", CNR, Campi Flegrei 34, 80078 Pozzuoli, Italy (literal)

Titolo

NbN nanowire optical detectors for high speed applications (literal)

Abstract

We have developed a novel geometry for single photon optical detectors (SSPD) based on NbN nanowires. Traditionally the SSPD are realized in a meander structure in order to realize a reasonable (few square microns) collecting area. This has the disadvantage of generating a large detector inductance, mostly of kinetic origin, that strongly limits the detector operation in high speed applications, such as telecommunication. Moreover the extreme aspect ratio of the detector (a nanowire a fraction of mm long and 100 nm wide) puts strong requirements on the nanofabrication processes, with negative effects on the production yield. Our novel proposed geometry is based on a parallel stripes configuration designed in such a way that the light induced switching of a single stripe generates the switching of all the other through a cascade mechanism. The net result is an SSPD device that has a much lower intrinsic inductance, and consequently a much wider bandwidth (up to 10 GHz range). Moreover the signal amplitude generated is much larger than that of traditional SSPD, due to the contribution of all the parallel stripe. We present here the design and results of numerical simulation of the response of this novel type of SSPD. In particular we discuss of the design solutions that allow the cascade operation of the detector, by realizing a very fast and synchronous switching of all the parallel lines. Key issues, such as the optimal number of parallel lines, with respect to fabrication and operation constraints of the detectors are also discussed. (literal)

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