Lateral optical force optimisation based on periodic arrays of a single motif

Bo Gao, Simon Hanna*, Henkjan Gersen

*Corresponding author for this work

Research output: Contribution to conferenceConference Paperpeer-review


Lateral optical forces (LOFs) exerted on metamaterials typically arise from the broken mirror symmetry in the system. It has been reported that a repeated pair of particles or circular motifs with different sizes or refractive indices can generate LOFs. Studies show that an optimised LOF could be large enough to manipulate the structure moving at a macroscopic scale. We demonstrate that this force can also be generated by a repeated single triangle motif. By adjusting the size and shape of the triangle, we can control the magnitude and direction of the LOF. The optimised structure parameters can be found by optimisation routines such as Bayesian optimisation combined with optical force calculation methods such as rigorous coupled-wave analysis.
Original languageEnglish
Publication statusPublished - 5 Oct 2023

Bibliographical note

Funding Information:
BG acknowledges the China Scholarship Council (CSC) and University of Bristol for a postgraduate scholarship (award number 202008060217), and the Advanced Computing Research Centre (ACRC) at the University of Bristol for High Performance Computing platform BlueCrystal phase4 (BC4) support.

Publisher Copyright:
© 2023 SPIE.


  • Metamaterials
  • optical forces
  • rigorous coupled-wave analysis
  • Bayesian optimisation


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