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Articles by Xianglin Ye
Polarization-multiplexed diffractive neural networks for multi-task classification based on liquid crystals
All-optical diffractive neural networks have attracted extensive attention due to their characteristics of high parallelism, high processing speed, and low energy consumption. However, most existing DNN frameworks are designed for single-task operations and lack the flexibility to handle multiple tasks within an artificial intelligence (AI) system. Here, we propose polarization-multiplexed diffractive neural network (PMDNN) based on liquid crystals for multi-task classification.
Bifocal lenses with adjustable intensities enabled by bilayer liquid crystal structures
In this paper, we propose bifocal lenses based on bilayer structures composed of a liquid crystal (LC) cell and LC polymer, and the relative intensity of two foci can be adjusted arbitrarily through applying an external voltage.
Rotating twisted templates for imprinting polarization gratings with a sub- to dozen-micron period
In this Letter, we report and experimentally demonstrate what is to our knowledge a novel scheme for imprinting polarization gratings (PGs) with a pair of templates. Compared with the traditional method that a single template can only imprint PG with a single period, cascading two templates can control the period of imprinted PG at will. However, the low diffraction efficiency is inevitably caused by cascading two templates.
Cascaded transflective liquid crystal planar lenses enable multi-plane augmented reality
In this Letter, we report and experimentally demonstrate the multi-plane augmented reality (AR) by combining the reflective polarization volume lens (PVL) and electrically controlled transmissive Pancharatnam–Berry (PB) liquid crystal (LC) lens. This strategy is based on the electrically controlled power-based approach, which significantly alleviates the challenge of vergence–accommodation conflict (VAC) of the current near-eye display (NED).
Simultaneous chiral polarization and edge enhancement imaging enabled by a single geometric-phase-based element
In this Letter, we propose a multifunctional imaging system enabled by a single geometric-phase-based liquid crystal (LC) element, which integrates chiral polarization and edge enhancement imaging. The element is located at the frequency domain plane in a 4F imaging system, and the phase profile of the element consists of a fork grating in the x direction and a grating in the y direction, which provide edge enhancement and chiral polarization imaging capabilities.
Optical imprinting subwavelength-period liquid crystal polarization gratings with dual-twist templates
Abstract In this Letter, we report a dual-twist template imprinting method to fabricate subwavelength-period liquid crystal polarization gratings (LCPGs). In other words, the period of the template must be reduced to 800 nm–2 µm, or even smaller. To overcome the inherent problem that the diffraction efficiency shrinks as the period decreases, the dual-twist templates were optimized by rigorous coupled-wave analysis (RCWA).
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