Here, we report the characterization of the transport of micro- and nanospheres in a simple two-dimensional square nanoscale plasmonic optical lattice. The optical potential was created by exciting plasmon resonance by way of illuminating an array of gold nanodiscs with a loosely focused Gaussian beam. This optical potential produced both in-lattice particle transport behavior, which was due to near-field optical gradient forces, and high-velocity (∼μm/s) out-of-lattice particle transport. As a comparison, the natural convection velocity field from a delocalized temperature profile produced by the photothermal heating of the nanoplasmonic array was computed in numerical simulations. This work elucidates the role of photothermal effects on micro- and nanoparticle transport in plasmonic optical lattices.
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Research Article|
May 06 2016
Characterization of the near-field and convectional transport behavior of micro and nanoparticles in nanoscale plasmonic optical lattices
Tsang-Po Yang;
Tsang-Po Yang
1Department of Electrical Engineering,
National Tsing Hua University
, Hsinchu 30013, Taiwan
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Gilad Yossifon;
Gilad Yossifon
2Faculty of Mechanical Engineering, Micro- and Nano-Fluidics Lab,
Technion-Israel Institute of Technology
, Technion City 32000, Israel
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Ya-Tang Yang
Ya-Tang Yang
a)
1Department of Electrical Engineering,
National Tsing Hua University
, Hsinchu 30013, Taiwan
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a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]
Note: Paper submitted as part of the selected papers from the 5th International Conference on Optofluidics (Guest Editors: Shih-Kang Fan and Zhenchuan Yang) held in Taipei, Taiwan, July 26–29, 2015.
Biomicrofluidics 10, 034102 (2016)
Article history
Received:
October 31 2015
Accepted:
April 25 2016
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Citation
Tsang-Po Yang, Gilad Yossifon, Ya-Tang Yang; Characterization of the near-field and convectional transport behavior of micro and nanoparticles in nanoscale plasmonic optical lattices. Biomicrofluidics 1 May 2016; 10 (3): 034102. https://doi.org/10.1063/1.4948775
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