Plasmonic electromagnetic hot spots temporally addressed by photoinduced molecular displacemen

L. Juan Mathieu, Jerome Plain*, Renaud Bachelot, Alexandre Vial, Pascal Royer, Stephen K. Gray, Jason M. Montgomery, Gary P. Wiederrechf

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

We report the observation of temporally varying electromagnetic hot spots in plasmonic nanostructures. Changes in the field amplitude, position, and spatial features are induced by embedding plasmonic silver nanorods in the photoresponsive azo-polymer. This polymer undergoes cis-trans isomerization and wormlike transport within resonant optical fields, producing a time-varying local dielectric environment that alters the locations where electromagnetic hot spots are produced. Finite-difference time-domain and Monte Carlo simulations that model the induced field and corresponding material response are presented to aid in the interpretation of the experimental results. Evidence for propagating plasmons induced at the ends of the rods is also presented.

Original languageEnglish
Pages (from-to)4647-4651
Number of pages5
JournalJournal of Physical Chemistry A
Volume113
Issue number16
DOIs
Publication statusPublished - 23 Apr 2009

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