2024 | Ze-Yu Wang, Zhou Zhou, Han Zhang, Yang Wei, Hong-Guan Yu, Wei Hu, Wei Chen, Hai-Tao Dai, Ling-Ling Ma, Cheng-Wei Qiu and Yan-Qing Lu
This paper introduces a novel single-layer liquid crystal (LC) vectorial holography method that enables versatile and tunable vectorial holography with independent control of polarization and amplitude at varying spatial positions. The method utilizes a single-layer LC to display vectorial holography, where both polarization and amplitude can be arbitrarily and independently controlled. The technique leverages the dynamic tunability of LCs to achieve electrically tunable, high-efficiency, and broadband vectorial optical fields. The proposed method demonstrates significant potential for advanced applications such as optical encryption, super-resolution imaging, and other vectorial optical technologies.
The key innovation lies in the use of a single-layer LC with pixelated director distributions to achieve vectorial holography. This approach allows for the spatial multiplexing of LC holograms for left and right circular polarizations (LCP and RCP) into a single LC layer. The LC directors are aligned to produce the desired polarization and amplitude distributions, enabling the generation of complex vectorial optical fields. The method employs a two-loop-iteration modified Gerchberg–Saxton (GS) algorithm to optimize the LC phase holograms for LCP and RCP, allowing for the simultaneous control of amplitude and phase differences.
The paper presents several applications of this technology, including a vectorial LC-holographic clock that encodes time information using polarization keys, and a vectorial LC-holographic lunar phase display that encodes continuously varied polarization and amplitude distributions. Additionally, the method is applied to create an active time-sequence vectorial holographic video, demonstrating the dynamic tunability of LC superstructures.
The results show that the proposed vectorial LC-holography method achieves high-quality holographic images with excellent broadband properties and high efficiency. The method is demonstrated with a spatial resolution of 1.1 μm and a polarization angle precision of ±0.2°, enabling the accurate generation of photoalignment patterns. The LC superstructures are fabricated using a dynamic microlithography photopatterning system, which allows for the precise control of LC director distributions.
The study highlights the potential of vectorial LC-holography for advanced optical applications, including optical encryption, super-resolution imaging, and other vectorial optical technologies. The method offers advantages such as dynamic tunability, easy fabrication, high efficiency, broad bandwidth, cost-effectiveness, high-quality performance, large-area manufacturing, and versatility, making LCs superior to most bulky optical components. The results demonstrate the feasibility of vectorial LC-holography as a promising technology for future optical applications.This paper introduces a novel single-layer liquid crystal (LC) vectorial holography method that enables versatile and tunable vectorial holography with independent control of polarization and amplitude at varying spatial positions. The method utilizes a single-layer LC to display vectorial holography, where both polarization and amplitude can be arbitrarily and independently controlled. The technique leverages the dynamic tunability of LCs to achieve electrically tunable, high-efficiency, and broadband vectorial optical fields. The proposed method demonstrates significant potential for advanced applications such as optical encryption, super-resolution imaging, and other vectorial optical technologies.
The key innovation lies in the use of a single-layer LC with pixelated director distributions to achieve vectorial holography. This approach allows for the spatial multiplexing of LC holograms for left and right circular polarizations (LCP and RCP) into a single LC layer. The LC directors are aligned to produce the desired polarization and amplitude distributions, enabling the generation of complex vectorial optical fields. The method employs a two-loop-iteration modified Gerchberg–Saxton (GS) algorithm to optimize the LC phase holograms for LCP and RCP, allowing for the simultaneous control of amplitude and phase differences.
The paper presents several applications of this technology, including a vectorial LC-holographic clock that encodes time information using polarization keys, and a vectorial LC-holographic lunar phase display that encodes continuously varied polarization and amplitude distributions. Additionally, the method is applied to create an active time-sequence vectorial holographic video, demonstrating the dynamic tunability of LC superstructures.
The results show that the proposed vectorial LC-holography method achieves high-quality holographic images with excellent broadband properties and high efficiency. The method is demonstrated with a spatial resolution of 1.1 μm and a polarization angle precision of ±0.2°, enabling the accurate generation of photoalignment patterns. The LC superstructures are fabricated using a dynamic microlithography photopatterning system, which allows for the precise control of LC director distributions.
The study highlights the potential of vectorial LC-holography for advanced optical applications, including optical encryption, super-resolution imaging, and other vectorial optical technologies. The method offers advantages such as dynamic tunability, easy fabrication, high efficiency, broad bandwidth, cost-effectiveness, high-quality performance, large-area manufacturing, and versatility, making LCs superior to most bulky optical components. The results demonstrate the feasibility of vectorial LC-holography as a promising technology for future optical applications.