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Optical lifting force under focused evanescent wave illumination: A ray optics model

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posted on 2024-07-09, 23:38 authored by Smitha Kuriakose, Xiaosong Gan, James ChonJames Chon, Min Gu
We propose a ray optics model to calculate the trapping force on a dielectric particle located on the interface between two media and illuminated by a focused evanescent field beam. Such a focused evanescent beam is produced by a high numerical aperture objective with a central obstruction whose size satisfies the total internal reflection condition on the interface. The dependence of the lifting force on the obstruction size, the particle size, and the distance of the particle from the interface is revealed.

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ISSN

0021-8979

Journal title

Journal of Applied Physics

Volume

97

Issue

8

Pagination

1 p

Publisher

American Institute of Physics

Copyright statement

Copyright © 2005 American Institute of Physics. is reproduced in accordance with the copyright policy of the publisher.

Language

eng

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