Diffusiophoresis-induced nanoscale particle transport, trapping, and manipulation using optical anapole antenna

Ikjun Hong; Chuchuan Hong; Theodore H. Anyika; Justus C. Ndukaife

doi:10.1117/12.2680300

5 October 2023 Diffusiophoresis-induced nanoscale particle transport, trapping, and manipulation using optical anapole antenna

Ikjun Hong, Chuchuan Hong, Theodore H. Anyika, Justus C. Ndukaife

Author Affiliations +

Proceedings Volume PC12649, Optical Trapping and Optical Micromanipulation XX; PC126491R (2023) https://doi.org/10.1117/12.2680300
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Conference Poster

Abstract

We propose a platform that can transport, trap, and manipulate nanoscale particles using a combination of diffusiophoretic and near-field optical gradient forces. This platform operates with an anapole state under 532 nm laser illumination. The anapole antenna enhances the electromagnetic field through a slot that also makes the field accessible, and simultaneously operates as a nanoscale heat source to induce thermophoretic depletion of PEG, creating a diffusiophopretic force that delivers particles to the region of enhanced field for additional trapping by the optical gradient force. Our preliminary results have demonstrated transportation, agglomeration, and tweezing action of 300 nm particles in a 10% PEG solution.

Citation Download Citation

Ikjun Hong, Chuchuan Hong, Theodore H. Anyika, and Justus C. Ndukaife "Diffusiophoresis-induced nanoscale particle transport, trapping, and manipulation using optical anapole antenna", Proc. SPIE PC12649, Optical Trapping and Optical Micromanipulation XX, PC126491R (5 October 2023); https://doi.org/10.1117/12.2680300

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