Purcell effect for finite-length metal-coated and metal nanowires

Konstantin V. Filonenko, Morten Willatzen, Vladimir G. Bordo

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We investigate the modification (enhancement and suppression) of the spontaneous emission rate of a dipole emitter in two configurations: inside a finite-length semiconductor nanowire surrounded by bulk metal and in the vicinity of a finite metal nanowire. Our analysis is based on a first-principle approach, which is reduced to a seminumeric one in the limit of large nanowire aspect ratios. The numerical calculations are carried out for an emitter in a GaAs nanowire embedded in Ag or Au and for that nearby an Ag or Au nanowire in vacuum or dielectric. We consider in detail the Purcell and β factors as functions of the cylinder radius, the emitter position, and the transition frequency for both configurations. We contrast the results for finite-length nanowires with those obtained in the infinite-length approximation and find considerable differences in the Purcell factor magnitude.
Original languageEnglish
JournalJOURNAL OF THE OPTICAL SOCIETY OF AMERICA B
Volume31
Issue number8
Pages (from-to)2002-2011
ISSN0740-3224
DOIs
Publication statusPublished - 2014

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