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Optical manipulation and the angular momentum of light

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AnnaONeilPhDthesis2002_original_C.pdf (17.51Mb)
Date
2002
Author
O'Neil, Anna T.
Supervisor
Padgett, Miles
Sibbett, Wilson
Metadata
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Abstract
This thesis consists primarily of an investigation into the action of laser light on particles held within optical tweezers. I present work on a dynamic method of measuring both the axial and lateral efficiencies of optical tweezers using Laguerre-Gaussian laser modes. I have developed a new and straight¬ forward way of using an aperture within optical tweezers to rotate particles. I demonstrate a new method for trapping metal particles which is interesting for the insight it gives into the fundamental properties of light. Finally, I show the different ways spin and orbital angular momentum interact with a particle placed off-axis in a Laguerre-Gaussian beam. In addition to the work on optical tweezers I also explain a novel method for producing any type of pure laser mode from a Hermite-Gaussian laser mode. A summary of my conclusions together with some ideas for future work is included.
Type
Thesis, PhD Doctor of Philosopy
Collections
  • Physics & Astronomy Theses
URI
http://hdl.handle.net/10023/21888

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