Optical trapping of microparticles with cascaded tapered waveguides

Zhi Cheng; Yongjun Guo; Lin Zhang

doi:10.1117/12.2601321

9 October 2021 Optical trapping of microparticles with cascaded tapered waveguides

Zhi Cheng, Yongjun Guo, Lin Zhang

Proceedings Volume 11894, Optoelectronic Devices and Integration X; 118940W (2021) https://doi.org/10.1117/12.2601321
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Conference Poster

Abstract

Recently, near-field optical tweezers integrated on a chip based on silicon on insulator (SOI) have attracted more attention and are promising for biological and chemical analyses. Here we propose a low-loss tapered Si waveguide with a high intensity gradient in the electric field to trap microparticles whose diameters vary from 1 μm to 5 μm. The high transmittance allows for cascading the traps along the direction of light propagation. Optical forces in all three dimensions are analyzed around a high-stiffness potential well obtained.

Conference Presentation

Citation Download Citation

Zhi Cheng, Yongjun Guo, and Lin Zhang "Optical trapping of microparticles with cascaded tapered waveguides", Proc. SPIE 11894, Optoelectronic Devices and Integration X, 118940W (9 October 2021); https://doi.org/10.1117/12.2601321

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