University of Illinois Urbana-Champaign

Novel optical trapping - from enhanced forces via vector beams to characterizing optical properties of trapped microparticles

Roxworthy, Brian J.

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Roxworthy_Brian.pdf

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https://hdl.handle.net/2142/24357

Description

Title
Novel optical trapping - from enhanced forces via vector beams to characterizing optical properties of trapped microparticles
Author(s)
Roxworthy, Brian J.
Issue Date
2011-05-25T14:35:57Z
Director of Research (if dissertation) or Advisor (if thesis)
Toussaint, Kimani C.
Department of Study
Mechanical Sci & Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Date of Ingest
2011-05-25T14:35:57Z
Keyword(s)
  • Optical Forces
  • Polarization
  • Measuring Optical Properties
Abstract
The main purpose of this thesis is to investigate the eff ects of polarization on optical forces as well as to utilize such forces in the measurement of optical properties of micro-scale particles. Theoretical aspects of optical trapping are presented and the focusing action of high numerical aperture lenses is studied in detail. Simulations are performed that quantify the x, y and z focal polarization components of conventional Gaussian beams as well as 4 cylindrical vector beams, and the simulation results are used to explain experimental optical trapping behavior of the 5 beams. In addition, the custom built optical trapping microscope is used for quantitative phase imaging of 1 um microspheres, and the results are presented as a first step toward the measurement of the optical properties of optically trapped particles.
Graduation Semester
2011-05
Permalink
http://hdl.handle.net/2142/24357
Copyright and License Information
Copyright 2011 Brian J. Roxworthy

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