Abstract
Holography as a true three-dimensional (3-D) technique is thought to be the ultimate display technique. However, dynamic holographic materials still have problems such as slow refresh, high applied electrical field, etc., to be solved to realize video-rate 3-D display. We present silver nanoparticles (Ag NPs) doped liquid crystal films with very big birefringence and super-fast hologram refresh speed as real-time dynamic holographic medium, which can be applied in holographic video display. And the fastest response time of both build-up and self-erasure of hologram can be up to 0.1 ms, which means the material has the ability to realize a smooth holographic video-rate display. The holographic diffraction efficiency dependent on the intensity of recording light, applied electrical field, etc. is investigated. The maximum diffraction efficiency is measured up to 50% under a low applied electrical field of 0.12 V/$\mu$m. Real-time holographic videos at red, green, and blue colors are obtained and the process of hologram formation is analyzed, which shows that the LC films doped Ag NPs can be a good candidate for applications of large-size, real-time, color holographic true 3-D display in future.
Highlights
With the rapid development of digital information technology, three-dimensional (3D) display has attracted growing attention [1]–[3]
We present silver nanoparticles (Ag NPs) doped liquid crystal films with very big birefringence and super-fast hologram refresh speed as real-time dynamic holographic medium, which can be applied in holographic video display
In 2007 and 2012, we reported realtime dynamic holographic display based on Disperse Red 1 doped liquid crystal thin film with fast response [11], [12]
Summary
With the rapid development of digital information technology, three-dimensional (3D) display has attracted growing attention [1]–[3]. Holography is supposed to be a true 3D technique to provide a vivid image of a real object or a scene because it has the ability to rebuild both the intensity and phase information of the true nature of an object or a scene, making it possible for the observer to perceive the light as it would be scattered by the real object itself without the need of a special eyewear [4]–[7] It has not been widely applied in commercial display because there are some problems that have not been solved. We obtain the real-time holographic videos of red, green and blue colors in LC films, which means that it may be a prospective material for advanced applications in real-time dynamic holography
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