Trapping with local evanescent light fields

A. Zelenina; R. Quidant; D. Petrov; G. Badenes; M. Nieto-Vesperinas

doi:10.1117/12.615043

26 August 2005 Trapping with local evanescent light fields

A. Zelenina, R. Quidant, D. Petrov, G. Badenes, M. Nieto-Vesperinas

Proceedings Volume 5930, Optical Trapping and Optical Micromanipulation II; 59301S (2005) https://doi.org/10.1117/12.615043
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Following the recent advances in nano-optics, optical manipulation by evanescent fields instead of conventional propagating fields has recently awaken an increasing interest. The main advantages of using low dimensionality fields are (i) the possibility of integrating on a chip applications involving optical forces but also (ii) the absence of limitation by the diffraction limit for the trapping volume. Previous works have investigated theoretically and experimentally the guiding of dielectric and metallic beads at an interface sustaining an extended surface wave. In this work, we study theoretically the radiation forces exerted on Rayleigh dielectric beads under local evanescent illumination. Especially, we consider the configuration where a three-dimensional Gaussian beam is totally reflected at the interface of a glass prism. The results point out the illumination parameters where the gradient forces exceed the scattering force and allow for a stable trapping. The effect of the Goos-Haenchen shift on the location of the trapping site is also discussed.

Citation Download Citation

A. Zelenina, R. Quidant, D. Petrov, G. Badenes, and M. Nieto-Vesperinas "Trapping with local evanescent light fields", Proc. SPIE 5930, Optical Trapping and Optical Micromanipulation II, 59301S (26 August 2005); https://doi.org/10.1117/12.615043

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