Computational inverse design of non-intuitive illumination patterns to maximize optical force or torque
Name
Manuscript_v35_Arxiv.pdf
Description
Main article
Size
6.41 MB
Format
Adobe PDF
Checksum (MD5)
4d61e320b949550480b4516a5675c628
Author(s)
Lee, Yoonkyung E.
Miller, Owen D.
Reid, McMahon Thomas Homer
Johnson, Steven G
Fang, Xuanlai
Date Issued
March 2017
Journal
Optics Express
Publisher
Optical Society of America
Citation
Lee, Yoonkyung E. et al. “Computational Inverse Design of Non-Intuitive Illumination Patterns to Maximize Optical Force or Torque.” Optics Express 25.6 (2017): 6757.
Version
Author's final manuscript
Abstract
This paper aims to maximize optical force or torque on arbitrary micro- and nanoscale objects using numerically optimized structured illumination. By developing a numerical framework for computer-automated design of 3d vector-field illumination, we demonstrate a 20-fold enhancement in optical torque per intensity over circularly polarized plane wave on a model plasmonic particle. The nonconvex optimization is efficiently performed by combining a compact cylindrical Bessel basis representation with a fast boundary element method and a standard derivative-free, local optimization algorithm. We analyze the optimization results for 2000 random initial configurations, discuss the tradeoff between robustness and enhancement, and compare the different effects of multipolar plasmon resonances on enhancing force or torque. All results are obtained using open-source computational software available online.
MIT Department
Massachusetts Institute of Technology. Department of Mathematics
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1364/OE.25.006757
