25 January 2008 From Gaussian beams to optical landscapes: phase-only apertures based on the generalized phase contrast method
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Abstract
The generalized phase contrast method (GPC) can produce a rich variety of optical landscapes from an incident flattop beam. Here we show that the GPC can generate various intensity distributions directly from an incident Gaussian illumination. This is illustrated by using GPC-based implementation of phase-only apertures that efficiently redirect the available photons from an initial bell-shaped intensity distribution into desired configurations. GPC can reshape a Gaussian beam into patterns having sharp intensity transitions and a flat phase profile in the bright regions with superior energy efficiency over amplitude masks. Eliminating the initial Gaussian-to-flattop beamshaping requirement can be beneficial for various applications employing GPC-based patterns.
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Darwin Palima, Jeppe Seidelin Dam, Ivan Perch-Nielsen, Jesper Glückstad, "From Gaussian beams to optical landscapes: phase-only apertures based on the generalized phase contrast method", Proc. SPIE 6905, Complex Light and Optical Forces II, 69050B (25 January 2008); doi: 10.1117/12.762867; https://doi.org/10.1117/12.762867
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