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

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Authors:
  • Filonenko, Konstantin V. ;
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    University of Southern Denmark
  • Willatzen, Morten ;
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    Department of Photonics Engineering, Technical University of Denmark
  • Bordo, Vladimir G.
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    University of Southern Denmark
DOI:
10.1364/JOSAB.31.002002
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.
Type:
Journal article
Language:
English
Published in:
Journal of the Optical Society of America B, 2014, Vol 31, Issue 8, p. 2002-2011
Main Research Area:
Science/technology
Publication Status:
Published
Review type:
Peer Review
Submission year:
2014
Scientific Level:
Scientific
ID:
269687864

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