Gradient and scattering forces on a Kerr nanosphere

Authors

Romeric F. Pobre Physics Department, De La Salle University
Caesar A. Saloma National Institute of Physics, University of the Philippines Diliman

Abstract

A theoretical model that computes both for the gradient and scattering forces being exerted on a nonresonant nonlinear (electro-optic Kerr effect) rigid nanosphere by a strongly focused continuous wave laser beam is presented. The incident wavelength of the laser beam is assumed to be appreciably larger than the nanosphere radius a. Optical forces arising from the aforesaid interaction can be derived by a two-component approach which determines individually the gradient force and the scattering force. The behavior of the trapping (gradient) force is plotted against several experimental parameters e.g. incident beam power, axial distance, sphere radius, wavelength, and refractive index difference between the surrounding liquid and the nanosphere. Results have shown that Kerr effect on the nanosphere can produce a maximum of ten fold increase in the trapping force.

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Issue

2004: Proceedings of the 22nd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2004-3C-01

Section

Theoretical and Computational Physics

Published

2004-10-25

How to Cite

[1]

RF Pobre and CA Saloma, Gradient and scattering forces on a Kerr nanosphere, Proceedings of the Samahang Pisika ng Pilipinas 22, SPP-2004-3C-01 (2004). URL: https://proceedings.spp-online.org/article/view/SPP-2004-3C-01.