Presentation by A. Callegari at AI for Scientific Data Analysis, Gothenburg, 31 May 2023

Focused rays scattered by an ellipsoidal particles. (Image reproduced from: 10.1021/acsphotonics.2c01565.)
Faster and more accurate geometrical-optics optical force calculation using neural networks
Agnese Callegari

Optical forces are often calculated by discretizing the trapping light beam into a set of rays and using geometrical optics to compute the exchange of momentum. However, the number of rays sets a trade-off between calculation speed and accuracy. Here, we show that using neural networks permits one to overcome this limitation, obtaining not only faster but also more accurate simulations. We demonstrate this using an optically trapped spherical particle for which we obtain an analytical solution to use as ground truth. Then, we take advantage of the acceleration provided by neural networks to study the dynamics of an ellipsoidal particle in a double trap, which would be computationally impossible otherwise.

Date: 31 May 2023
Time: 10:45
Place: MC2 Kollektorn
Event: AI for Scientific Data Analysis: Miniconference

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