Linearly polarized ultraviolet light

Kawatsuki N, Yamamoto T, Ono H (1999) Photoinduced aligmnent control of photoreactive side-chain polymer liquid crystal by linearly polarized ultraviolet light. Appl Phys Lett 74 935-937 Kawatsuki N, Matsuyoshi K, Hayashi M, Takatsuka H, Yamamoto T (2000) Photoreaction of photo-cross-linkable methacrylate polymer films comprising 2-ciimamoyloxyethoxybiphenyl side group by linearly polarized ultraviolet light and liquid crystal alignment on the resultant films. Chem Mater 12 1549-1555... 

Kawatsuki N, Kuwabara M, Matsuura Y, Ono H, Emoto A (2004) Control of thermally enhanced photoinduced reorientation direction of photocrosslinkable copolymer liquid crystals and application to polarization gratings using linearly polarized ultraviolet light. Jpn J Appl Phys... 

The change in molecular orientation of a film of polyamic acid (PAA) with azobenzene units in the backbone structure, induced by irradiation with linearly polarized ultraviolet light (LPUVL irradiation), has been investigated [22, 23], The PAA backbone structure rotated towards the plane perpendicular to the polarization direction of LPUVL. This angular reorientation occurred through repeated photoisomerization reactions of the azobenzene unit. The change in molecular orientation... 

J. Chen, D. L. Johnson, P. J. Bos, X. Wang, and J. L. West, Model of liquid crystal alignment by exposure to linearly polarized ultraviolet light. Physical Review E 54, 1599 (1996). 

M. Nishikawa, B. Taheri, and J. L. West, Mechanism of unidirectional liquid-crystal alignment on polyimides with linearly polarized ultraviolet light exposure. Applied Physics Letters 72, 2403 (1998). 

K. Sakamoto, K. Usami, M. Watanabe, R. Arafune, and S. Ushioda, Surface anisotropy of polyimide film irradiated with linearly polarized ultraviolet light. Applied Physics letters 72, 1832 (1998). 

The most common form of optical activity was first measured at a constant wavelength by the angle of rotation of linearly polarized light. More recently the measurements have been extended to the entire range of visible and attainable ultraviolet regions where electronic transitions are observed, giving rise to the ORD technique (Optical Rotatory Dispersion). The Cotton effects appear in the region of optically active absorption bands outside of these bands the plain curve spectrum is also dependent on all the electronic transitions of the chromophores. 

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