Optical Trapping of Nanoparticles Using All-Silicon Nanoantennas
Zhe Xu, Wuzhou Song, Kenneth B Crozier
ACS PHOTONICS | AMER CHEMICAL SOC | Published : 2018
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..View full abstract
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Awarded by Australian Research Council
This research was sponsored in part by the Australian Research Council (DP150103736, DP180104141, and FT140100577), by the Victorian Endowment for Science, Knowledge and Innovation (VESKI), and by the Laby Foundation.