Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Ray-tracing methodology: application of spatial analytic geometry in the ray-optic model of optical tweezers

Not Accessible

Your library or personal account may give you access

Abstract

Traditional solid geometry ray-tracing method is complex in analyzing the orientation of gradient forces and calculating incident angle of optic rays upon a microsphere. We present a new ray-tracing methodology based on spatial analytic geometry in the ray-optic model. For a single ray upon a microsphere, the directions of transmission and trapping forces are depicted by spatial vectors in a Cartesian coordinate system. At the same time, the polarized direction of a single focused ray can be transformed by a matrix of rotational coordinates. According to the relations of vectors, the trapping forces can be expressed identically. We use this new method to discuss differences of trapping forces in the cases of various states of unpolarized and polarized beams, and also show the reasons for differences in transverse force between measurement and theoretical results. Our simulative results show that this method can be applied identically to calculating both transverse and axial trapping forces, and also for different polarizations of a laser beam.

© 2008 Optical Society of America

Full Article  |  PDF Article
More Like This
Axial optical trapping forces on two particles trapped simultaneously by optical tweezers

Shenghua Xu, Yinmei Li, and Liren Lou
Appl. Opt. 44(13) 2667-2672 (2005)

Optical force model based on sequential ray tracing

Eric Aspnes, Tom D. Milster, and Koen Visscher
Appl. Opt. 48(9) 1642-1650 (2009)

Parametric study of the forces on microspheres held by optical tweezers

W. H. Wright, G. J. Sonek, and M. W. Berns
Appl. Opt. 33(9) 1735-1748 (1994)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (19)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics

Select as filters


Select Topics Cancel
© Copyright 2022 | Optica Publishing Group. All Rights Reserved