Polarization-dependent circular Dammann grating made of azo-dye-doped liquid crystals
Demir, H. V.
OSA - The Optical Society
2316 - 2321
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Please cite this item using this persistent URLhttp://hdl.handle.net/11693/21921
A polarization-dependent circular Dammann grating (CDG) was generated from an azo-dye-doped liquid crystal (LC) cell. A simple multiexposure photo-alignment process was used to fabricate a binary phase LC CDG zone plane, which was composed of an odd zone with a twisted nematic LC structure and an even zone with a homogenous LC structure. A two-order CDG with equal-intensity rings was produced through a Fourier transform. The maximum zeroth and first diffraction orders of obtained CDG can be separately achieved by rotating the analyzer's polarization direction. The CDG using an azodye- doped LC cell can be used to generate diffractions by lasers in a broad wavelength range, hence expanding possible device applications. © 2011 Optical Society of America.