本論文利用常用的水平配向膜聚乙烯醇（PVA）摻雜甲基橙染料發展出可重複配向的表面光配向技術，並且利用此技術以兩次曝光並搭配一個條紋光罩的簡單製程製作可以電壓控制繞射效率的兩區互相垂直之複合型配向液晶相位光柵（binary orthogonal hybrid LC phase grating）。此相位光柵的繞射效率與入射偏振無關，第壹階繞射效率最高可達39％，最低可達2％以下，而且第一階繞射點的偏振性相對於入射光具有半波板的效應，可將之利用在可調偏振性及電控效率的分光元件上，雖然實際樣品因邊界過渡區域的液晶排列影響，無法使零階及偶數階如理論預期在液晶長短軸方向相位差ΔΦ=π時完全消失，但是零階及偶數階在此時繞射已相當微弱，配合適當角度的檢偏器情況下可使之幾乎完全消失，所以並不影響其使用價值。

Mixing PVA, a commonly used alignment film to obtain a homogenous liquid crystal (LC) cell, with the methyl orange azo-dye, we develop a re-writable surface photoalignment technique. Based on this technique, we fabricate an electrically controllable binary orthogonal hybrid LC phase grating using two step exposures together with a single-masking process. It is found that the grating is polarization-independent. The maximum and minimum efficiencies of the first order diffraction are 39％, and 2％,respectively. The grating functions a half-wave plate for the first order diffracted beam. It can be applied for uses as polarization- and intensity- controllable beam splitters. Due to the boundary zones resulting from continuous LC alignment, the zeroth- and even orders do not vanish at ΔΦ=π as predicted theoretically, ΔΦ is the phase difference between of the two waves with their polarizations along the direction of LC long axis and short axis. Yet these diffractions are very weak, we can block them off using an adequate analyzer. Thus ,the fabricated grating has potential for practical applications.

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