Optical nanotweezers based on plasmonic apertures designed by algorithm

Kenneth B. Crozier

doi:10.1117/12.2595395

1 August 2021 Optical nanotweezers based on plasmonic apertures designed by algorithm

Kenneth B. Crozier

Author Affiliations +

Proceedings Volume 11798, Optical Trapping and Optical Micromanipulation XVIII; 117981R (2021) https://doi.org/10.1117/12.2595395
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

We use machine learning (simulated annealing) to design plasmonic nanoapertures that function as optical nanotweezers. The nanoapertures have irregular shapes that are chosen by our algorithm. We present electromagnetic simulations that show that these produce stronger field enhancements and extraction energies than nanoapertures comprising double nanoholes with the same gap geometry. We show that performance is further improved by etching one or more rings into the gold surrounding the nanoaperture. We provide a direct comparison between our design and work that is representative of the state of the art in plasmonic nanotweezers at the time of writing. Lastly, we provide experimental results that compare our algorithm-designed structure to a double nanohole design

Conference Presentation

Citation Download Citation

Kenneth B. Crozier "Optical nanotweezers based on plasmonic apertures designed by algorithm", Proc. SPIE 11798, Optical Trapping and Optical Micromanipulation XVIII, 117981R (1 August 2021); https://doi.org/10.1117/12.2595395

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