Reversal in axial symmetry of nonlinear optical trapping potential for metallic nanoparticles: generalized Lorenz-Mie theory

Sumit Yadav; Anita Devi; Arijit K. De

doi:10.1117/12.2570664

20 August 2020 Reversal in axial symmetry of nonlinear optical trapping potential for metallic nanoparticles: generalized Lorenz-Mie theory

Sumit Yadav, Anita Devi, Arijit K. De

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Proceedings Volume 11463, Optical Trapping and Optical Micromanipulation XVII; 114632C (2020) https://doi.org/10.1117/12.2570664
Event: SPIE Nanoscience + Engineering, 2020, Online Only

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Abstract

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.

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Sumit Yadav, Anita Devi, and 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

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