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Recently, the effect of optical nonlinearity in laser trapping has been investigated under pulsed excitation, and it was observed that the inclusion of nonlinearity significantly modulates trapping potential for metallic nanoparticles using dipole approximation. In this paper, we present theoretical studies on nonlinear laser trapping for silver nanoparticles using generalized Lorenz-Mie theory. We observe a reversal in the direction of asymmetry of potential well and splitting of the potential well due to nonlinear effects which is further modulated with an increase in laser power.
Sumit Yadav,Anita Devi, andArijit K. De
"Reversal in axial symmetry of nonlinear optical trapping potential for metallic nanoparticles: generalized Lorenz-Mie theory", Proc. SPIE 11463, Optical Trapping and Optical Micromanipulation XVII, 114632C (20 August 2020); https://doi.org/10.1117/12.2570664
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Sumit Yadav, Anita Devi, Arijit K. De, "Reversal in axial symmetry of nonlinear optical trapping potential for metallic nanoparticles: generalized Lorenz-Mie theory," Proc. SPIE 11463, Optical Trapping and Optical Micromanipulation XVII, 114632C (20 August 2020); https://doi.org/10.1117/12.2570664