Abstract
Holography can produce the most real three-dimensional (3D) image, and is considered as the ultimate 3D display technology. However, compared with other display technologies, it has not been practically available in video display so far due to low refresh rate. To realize dynamic holographic display, photosensitive material doped liquid crystal (LC) has been discovered and deeply investigated because of superior photorefractive and photoelectric properties. In this work, we present a dynamic holographic display using LC film doped with perovskite (CsPbBr <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> ) nanocrystal (NC) as the photorefractive material. The dependence of diffraction efficiency and response time on doping concentration, recording beam power and applied voltage are investigated. A maximum diffraction efficiency of 18% has been achieved under a low electric field intensity of 0.45 V/μm and the shortest build-up time of grating is 5.5 ms. The system can realize a video display with 60 Hz refresh rate in red, green and blue colors, which demonstrates the feasibility of applying perovskite NC doped LC film in dynamic holographic display.
Highlights
R ECENTLY, with the rapid development of digital information technology, three-dimensional (3D) displays are attracting growing attention, and has gradually entered our real life
In order to further improve the performance of dynamic holographic display, optical holography based on refreshable photorefractive material has been deeply investigated, which can achieve short response time and high resolution without complex computing resources
We have investigated a dynamic holographic display system based on perovskite (CsPbBr3) nanocrystal (NC) [13]–[15] doped liquid crystal (LC) film
Summary
R ECENTLY, with the rapid development of digital information technology, three-dimensional (3D) displays are attracting growing attention, and has gradually entered our real life. In order to further improve the performance of dynamic holographic display, optical holography based on refreshable photorefractive material has been deeply investigated, which can achieve short response time and high resolution without complex computing resources. To realize high frame rate dynamic holographic display, photorefractive materials employed should possess fast response property with low power consumption. To achieve sufficient modulation of refractive index, photorefractive polymers always require high applied electrical field, making it not suitable for the real application [9]. Some researchers adopted doped liquid crystal (LC) materials with high birefringence index and sensitive photoconductivity to realize short response time and high diffraction efficiency under small electric field. The shortest response time of 5.5 ms has been obtained at an external voltage of 60 V, and a maximum diffraction efficiency of 18% was achieved at low driving electric field of 0.45 V/μm. The LC film doped with perovskite NC shows a great potential in real-time dynamic holographic display
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