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首页> 外文期刊>Liquid Crystals: An International Journal in the Field of Anisotropic Fluids >Polarisation-free and high-resolution holographic grating recording and optical phase conjugation with azo-dye doped blue-phase liquid crystals
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Polarisation-free and high-resolution holographic grating recording and optical phase conjugation with azo-dye doped blue-phase liquid crystals

机译：偏振和高分辨率全息光栅记录和光学相位缀合与偶氮染料掺杂的蓝相液晶

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摘要

We present the results of a detailed study of the mechanism and dynamics of holographic Bragg grating formation in azo-dye doped blue-phase liquid crystals. The principal mechanism leading to refractive index modulation is lattice distortion caused by photo-activated trans-cis isomerism of the azo-dye dopant. High diffraction efficiency bulk (Bragg) gratings with grating spacing as small as 1 mu m can be written with low optical power and do not require specific optical field polarisation. Furthermore, the written grating can be prolonged by uniform illumination with another laser, instead of being erased. Azo-doped blue-phase liquid crystals thus present themselves as highly promising photosensitive materials for high-resolution holographic recording and image processing application. An experimental demonstration of holographic image reconstruction via optical phase conjugation with excellent aberration correction capability is presented.
机译：我们提出了对偶氮染料掺杂蓝相液晶全息布拉格光栅形成的机制和动力学的详细研究结果。 导致折射率调制的主要机制是由偶氮染料掺杂剂的光活化的Trans-CIS异构性引起的晶格扭曲。 具有小于1μm的光栅间距的高衍射效率体积（布拉格）光栅可以用低光功率写入，并且不需要特定的光学场极化。 此外，可以通过与另一激光均匀的照射而不是被擦除来延长书面光栅。 因此，偶氮掺杂的蓝相液晶本身将自己作为高分辨率全息记录和图像处理应用的高度有前途的光敏材料。 呈现了具有优异的像差校正能力的光学相位缀合的全息图像重构的实验证明。

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