Nanophotonic antenna for optical trapping applications

Xin Tong; Lin Zhang

doi:10.1117/12.2603363

14 October 2021 Nanophotonic antenna for optical trapping applications

Xin Tong, Lin Zhang

Proceedings Volume 11894, Optoelectronic Devices and Integration X; 118940G (2021) https://doi.org/10.1117/12.2603363
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

By converting light from localized energy to freely propagating radiation, optical antennas are used for optical trapping and particle manipulation. Based on the optical antenna composed of etched trenches on a waveguide, we propose two integrated waveguide-based optical tweezers for the first time for trapping micro- and nano-particles. A quasi-Gaussian beam and a quasi-spherical-wave field well above the antenna are produced and the optical trapping of the microparticle and nanoparticle is demonstrated. The corresponding upward beams generate gradient forces up to hundreds of pN/W, which is enough to trap particles in microscale and nanoscale effectively. Particles well above the antennas, as high as about 18 μm, can be trapped. This new type of optical tweezers based on photonic antennas is believed to pave the way to build fully integrated photonic circuits with large-scale parallel particle manipulation.

Citation Download Citation

Xin Tong and Lin Zhang "Nanophotonic antenna for optical trapping applications", Proc. SPIE 11894, Optoelectronic Devices and Integration X, 118940G (14 October 2021); https://doi.org/10.1117/12.2603363

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