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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/6374

Title: Superpositions of light fields carrying orbital angular momentum
Authors: Dudley, A
Keywords: Optical fields
Light fields
Orbital angular momentum
Bessel beams
Spatial Light Modulator
Issue Date: Jan-2012
Citation: Dudley, A. 2012. Superpositions of light fields carrying orbital angular momentum. University of KwaZulu-Natal
Series/Report no.: Workflow;9626
Abstract: The work presented in this thesis is centred on the generation of superimposed optical fields which each carry orbital angular momentum (OAM) and the development of OAM measurement techniques. Optical fields which carry OAM have found applications ranging from optical tweezing to quantum cryptography. Due to the fact that they offer a potentially infinite-dimensional state space, much interest has been generated in the measurement of OAM in optical fields, in order for higher-dimensional quantum information processing to be realised. In this study we generate superpositions of higher-order Bessel beams and show that even though we can create a field which carries no overall OAM, we can still witness an angular rotation in the intensity profile of the beam. We also develop two new OAM measurement techniques: (1) a robust odd-even-OAM interferometer and (2) a method to measure the OAM density of an optical field by means of a single spatial light modulator (SLM).
Description: A thesis submitted in fulfilment of the academic requirements for the PhD degree of Science in the School of Chemistry and Physics, University of KwaZulu-Natal, Durban.
URI: http://hdl.handle.net/10204/6374
Appears in Collections:Laser physics and technology
General science, engineering & technology

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