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1 August 2021 Optical nanotweezers based on plasmonic apertures designed by algorithm
Kenneth B. Crozier
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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
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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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KEYWORDS
Plasmonics
Microscopes
Molecular lasers
Molecules
Nanomaterials
Nanoparticles
Optical tweezers
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