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Holographic polymer dispersed liquid crystal (HPDLC) is a new kind of holographic material. It can be fabricated by the photo-initiated polymerization-induced phase separation. HPDLC Bragg grating is composed of parallel, periodic polymer-rich and liquid crystal-rich lamellae. The diffraction efficiency (DE) can be switched by the application of electric field. HPDLC devices are potentially useful...
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