DSpace
 

DSpace at IIT Bombay >
IITB Publications >
Article >

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/54

Title: Resonant coupling between localized plasmons and anisotropic molecular coatings in ellipsoidal metal nanoparticles
Authors: AMBJORNSSON, TOBIAS
MUKHOPADHYAY, GAUTAM
APELL, SP
KALL, MIKAEL
Keywords: nanoparticle
metals
surface plasmon resonance
coatings
Issue Date: 2006
Publisher: Elsevier
Citation: Physical Review B 73 (8), 085412
Abstract: We present an analytic theory for the optical properties of ellipsoidal plasmonic particles covered by anisotropic molecular layers. The theory is applied to the case of a prolate spheroid covered by chromophores oriented parallel and perpendicular to the metal surface. For the case that the molecular layer resonance frequency is close to being degenerate with one of the particle plasmon resonances strong hybridization between the two resonances occurs. Approximate analytic expressions for the hybridized resonance frequencies, their extinction cross-section peak heights, and widths are derived. The strength of the molecular-plasmon interaction is found to be strongly dependent on olecular orientation and suggests that this sensitivity could be the basis for novel nanoparticle based bio- and chemo-sensing applications.
Description: ©2006 The American Physical Society "selected for the February 27, 2006 issue of Virtual Journal of Nanoscale Science & Technology available at http://www.vjnano.org."
URI: http://dx.doi.org/10.1103/PhysRevB.73.085412
http://hdl.handle.net/10054/54
http://dspace.library.iitb.ac.in/xmlui/handle/10054/54
Appears in Collections:Article

Files in This Item:

File Description SizeFormat
277.pdf719.72 kBAdobe PDFView/Open
PRB_73_085412(06).pdf718.37 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback