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Observation of Orbital Angular Momentum Sidebands due to Optical Reflection

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons200999

Aiello,  Andrea
Optical Quantum Information Theory, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Loffler, W., Aiello, A., & Woerdman, J. P. (2012). Observation of Orbital Angular Momentum Sidebands due to Optical Reflection. PHYSICAL REVIEW LETTERS, 109(11): 113602. doi:10.1103/PhysRevLett.109.113602.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-6887-4
Abstract
We investigate how the orbital angular momentum of a paraxial light beam is affected upon reflection at a planar interface. Theoretically, the unavoidable angular spread of the beam leads to orbital angular momentum sidebands, which are found to be already significant for a modest beam spread (0.05). In analogy to the polarization Fresnel coefficients, we develop an analytical theory based upon spatial Fresnel coefficients; this allows a straightforward prediction of the strength of the sidebands. We confirm this by experiment and numerical simulation.