Polarization-dependent circular Dammann grating made of azo-dye doped liquid crystals
Sun, X. W.
Dai, H. T.
Demir, H. V.
Optical Society of America
Luo, D., Sun, X. W., Dai, H. T., & Demir, H. V. (2011). Polarization-dependent circular Dammann grating made of azo-dye-doped liquid crystals. Applied optics, 50(15), 2316-2321.
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/12212
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 azo-dye-doped LC cell can be used to generate diffractions by lasers in a broad wavelength range, hence expanding possible device applications. (C) 2011 Optical Society of America