Inverse design of dielectric nanostructures for optical trapping

Beñat Martinez De Aguirre Jokisch; Ole Sigmund; Rasmus Ellebæk Christiansen

doi:10.1117/12.3025872

2 October 2024 Inverse design of dielectric nanostructures for optical trapping

Beñat Martinez De Aguirre Jokisch, Ole Sigmund, Rasmus Ellebæk Christiansen

Proceedings Volume 13112, Optical Trapping and Optical Micromanipulation XXI; 1311204 (2024) https://doi.org/10.1117/12.3025872
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

Optical trapping in nanostructures has usually been achieved utilizing the strong field gradients of plasmonics resonances. However, given the inherent optical losses in metals to heat dissipation, their use can prove detrimental to biological trapping settings and can affect other trapping properties. Dielectric nanostructures do not suffer these intrinsic losses, but it remains challenging to design dielectric structures with strong field gradients. In this work, we use inverse design by topology optimization to design a dielectric nanostructure that confines light to trap nanoparticles in air. The obtained trapping potential is deep enough – with a trapping depth below -10 k_BT – to overcome thermal fluctuations.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Beñat Martinez De Aguirre Jokisch, Ole Sigmund, and Rasmus Ellebæk Christiansen "Inverse design of dielectric nanostructures for optical trapping", Proc. SPIE 13112, Optical Trapping and Optical Micromanipulation XXI, 1311204 (2 October 2024); https://doi.org/10.1117/12.3025872

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