Linear polarization rotators based on dye-doped liquid crystal cells

Linear polarization rotator is fabricated by a single-side homogenously aligned dye-doped liquid crystal cell and linear variable neutral density filter (LVNDF). When a pump beam passing through the transmittance-linear region of LVNDF irradiates on the untreated surface, the surface LC director in...

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Bibliographic Details
Published in:Applied physics letters 2010-05, Vol.96 (19), p.191103-191103-3
Main Authors: Huang, Chia-Yi, Tsai, Hong-Yi, Wang, Yi-Hong, Huang, Chong-Ming, Lo, Kuang-Yao, Lee, Chia-Rong
Format: Article
Language:English
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Summary:Linear polarization rotator is fabricated by a single-side homogenously aligned dye-doped liquid crystal cell and linear variable neutral density filter (LVNDF). When a pump beam passing through the transmittance-linear region of LVNDF irradiates on the untreated surface, the surface LC director in the irradiation region is photoaligned into a continuous twist from 0° to 90°. Consequently, the bulk director gradually transits from a homogeneous to twist orientation. This device is capable of rotating the polarization of an input linearly polarized light depending on the beam position, exhibiting a large continuous twist region (5.6 mm) and high contrast ratio ( ∼ 1000 : 1 ) .
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3428773