Journal article

Optical Trapping of Nanoparticles Using All-Silicon Nanoantennas

Zhe Xu, Wuzhou Song, Kenneth B Crozier

ACS PHOTONICS | AMER CHEMICAL SOC | Published : 2018

Abstract

The ability to optically trap nanoscale particles in a reliable and noninvasive manner is emerging as an important capability for nanoscience. Different techniques have been introduced, including plasmonic nanostructures. Nano-optical tweezers based on plasmonics face the problem of Joule heating, however, due to high losses in metals. Here we experimentally demonstrate the optical trapping and transport of nanoparticles using a nonplasmonic approach, namely, a silicon nanoantenna. We trap polystyrene nanoparticles with diameters of 20 and 100 nm and use fluorescence microscopy to track their positions as a function of time. We show that multiple nanoparticles can be trapped simultaneously w..

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University of Melbourne Researchers