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10 February 2017 Numerical simulations of dual-waveguide trap with rough and tilted endfaces
Lei Dai, Guangzong Xiao, Xinlin Chen, Xiang Han, Shilong Jin
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Proceedings Volume 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016); 1025009 (2017) https://doi.org/10.1117/12.2266666
Event: Fourth International Conference on Optical and Photonics Engineering, 2016, Chengdu, China
Abstract
We build numerical models of dual-waveguide trap with rough and tilted endfaces using both the finite element method. The optical field distribution of waveguide trapping house with rough and tilt endfaces is simulated and analyzed. The results shows that rough endfaces cause the incident beam scattered and the tilted endfaces make incident beam refracted. According to optical field distribution, axial and transversal optical trapping forces are calculated. When endfaces roughness increase, both the axial and transversal trapping forces decrease, meaning trapping depth decreased. The transversal equilibrium positions move around unpredictably, off center. The stiffness and width of optical trap change little. When endfaces tilt angles increase, both the axial and transversal trapping forces decrease, meaning trapping depth decreased. The transversal equilibrium positions move along minus transversal axis. It is no obvious change in stiffness and width of optical trap.
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Lei Dai, Guangzong Xiao, Xinlin Chen, Xiang Han, and Shilong Jin "Numerical simulations of dual-waveguide trap with rough and tilted endfaces", Proc. SPIE 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016), 1025009 (10 February 2017); https://doi.org/10.1117/12.2266666
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KEYWORDS
Optical tweezers
Finite element methods
Integrated optics
Numerical simulations
Optical design
Surface roughness
Waveguides
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