Optical manipulation and catalytic activity enhanced by surface plasmon effect

Ningmu Zou; Jiang Min; Wenxiang Jiao; Guanghui Wang

doi:10.1117/12.2257280

17 February 2017 Optical manipulation and catalytic activity enhanced by surface plasmon effect

Ningmu Zou, Jiang Min, Wenxiang Jiao, Guanghui Wang

Proceedings Volume 10080, Plasmonics in Biology and Medicine XIV; 100800G (2017) https://doi.org/10.1117/12.2257280
Event: SPIE BiOS, 2017, San Francisco, California, United States

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.

Citation Download Citation

Ningmu Zou, Jiang Min, Wenxiang Jiao, and Guanghui Wang "Optical manipulation and catalytic activity enhanced by surface plasmon effect", Proc. SPIE 10080, Plasmonics in Biology and Medicine XIV, 100800G (17 February 2017); https://doi.org/10.1117/12.2257280

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