Title

Holographic Plasmonic Nanotweezers for Dynamic Trapping and Manipulation

Document Type

Article

Abstract

We demonstrate dynamic trapping and manipulation of nanoparticles with plasmonic holograms. By tailoring the illumination pattern of an incident light beam with a computer-controlled spatial light modulator, constructive and destructive interference of plasmon waves create a focused hotspot that can be moved across a surface. Specifically, a computer-generated hologram illuminating the perimeter of a silver Bull's Eye nanostructure generates surface plasmons that propagate toward the center. Shifting the phase of the plasmon waves as a function of space gives complete control over the location of the focus. We show that 200 nm diameter nanoparticles trapped in this focus can be moved in arbitrary patterns. This allows, for example, circular motion with linearly polarized light. These results show the versatility of holographically generated surface plasmon waves for advanced trapping and manipulation of nanoparticles.

Department(s)

Physics and Engineering

Publication Title

Nano Letters

Volume

17

Issue

12

First Page

7920

Last Page

7925

Publication Date

12-13-2017

DOI

10.1021/acs.nanolett.7b04289

ISSN

15306984

E-ISSN

15306992

PubMed ID

29144755

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