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. Author manuscript; available in PMC: 2019 Oct 23.
Published in final edited form as: ACS Nano. 2018 Sep 27;12(10):10383–10392. doi: 10.1021/acsnano.8b05824

Figure 2.

Figure 2.

Tunable opto-thermoelectric trapping of a 200 nm PS sphere on an AuNR antenna. Simulated optical absorption cross-sections (first column), simulated in-plane temperature profiles at the AuNR–substrate interface (second column), measured PS sphere position distributions projected on the SEM of the AuNR (third column), and measured histograms of the PS sphere displacements along the y axis of the AuNR (fourth column) for (a) 0°, (b) 30°, (c) 60°, and (d) 90° polarization angles of the laser beam relative to the x axis of the AuNR (see Figure 1d). The leftmost schematics illustrate the relative orientation of the laser beam polarization and the AuNR in planar views (i.e., viewed along the z direction in Figure 1d). A 780 nm laser beam with a power of 1.2 mW/μm2 and a beam size of 2 μm was focused on the AuNR. The scale bars are 500 nm.