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Proceedings Paper

Optical manipulation and catalytic activity enhanced by surface plasmon effect
Author(s): Ningmu Zou; Jiang Min; Wenxiang Jiao; Guanghui Wang
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Paper Abstract

For optical manipulation, a nano-optical conveyor belt consisting of an array of gold plasmonic non-concentric nano-rings (PNNRs) is demonstrated for the realization of trapping and unidirectional transportation of nanoparticles by polarization rotation of excitation beam. These hot spots of an asymmetric plasmonic nanostructure are polarization dependent, therefore, one can use the incident polarization state to manipulate the trapped targets. Trapped particles could be transferred between adjacent PNNRs in a given direction just by rotating the polarization of incident beam due to unbalanced potential. The angular dependent distribution of electric field around PNNR has been solved using the three- dimensional finite-difference time-domain (FDTD) technique. For optical enhanced catalytic activity, the spectral properties of dimers of Au nanorod-Au nanorod nanostructures under the excitation of 532nm photons have been investigated. With a super-resolution catalytic mapping technique, we identified the existence of "hot spot" in terms of catalytic reactivity at the gap region within the twined plasmonic nanostructure. Also, FDTD calculation has revealed an intrinsic correlation between hot electron transfer.

Paper Details

Date Published: 17 February 2017
PDF: 5 pages
Proc. SPIE 10080, Plasmonics in Biology and Medicine XIV, 100800G (17 February 2017); doi: 10.1117/12.2257280
Show Author Affiliations
Ningmu Zou, Cornell Univ. (United States)
Jiang Min, Nanjing Univ. (China)
Wenxiang Jiao, Nanjing Univ. (China)
Guanghui Wang, Nanjing Univ. (China)

Published in SPIE Proceedings Vol. 10080:
Plasmonics in Biology and Medicine XIV
Tuan Vo-Dinh; Joseph R. Lakowicz, Editor(s)

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