Shortening Focal Length of 100‐mm Aperture Flat Lens Based on Improved Sagnac Interferometer and Bifacial Liquid Crystal

Wen, Yifeng; Zhang, Qi; He, Qiong; Zhang, Feifei; Xiong, Lingxing; Zhang, Fei; Fu, Guoquan; Xu, Jin; Pu, Mingbo; Luo, Xiangang

doi:10.1002/adom.202300127

Cited by 9 publications

(2 citation statements)

References 58 publications

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“…Large-aperture liquid crystal devices have emerged as a significant area of research and technological innovation within the field of optics 43,44 . These devices leverage the unique properties of liquid crystals, such as the tunable refractive index and responsiveness to external electric fields, to create versatile and dynamically controllable optical components.…”

Section: Advances In Lc-slmsmentioning

confidence: 99%

A review of liquid crystal spatial light modulators: devices and applications

Yang,

Forbes,

Cao

2023

OES

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Spatial light modulators, as dynamic flat-panel optical devices, have witnessed rapid development over the past two decades, concomitant with the advancements in micro-and opto-electronic integration technology. In particular, liquid-crystal spatial light modulator (LC-SLM) technologies have been regarded as versatile tools for generating arbitrary optical fields and tailoring all degrees of freedom beyond just phase and amplitude. These devices have gained significant interest in the nascent field of structured light in space and time, facilitated by their ease of use and real-time light manipulation, fueling both fundamental research and practical applications. Here we provide an overview of the key working principles of LC-SLMs and review the significant progress made to date in their deployment for various applications, covering topics as diverse as beam shaping and steering, holography, optical trapping and tweezers, measurement, wavefront coding, optical vortex, and quantum optics. Finally, we conclude with an outlook on the potential opportunities and technical challenges in this rapidly developing field.

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Section: Advances In Lc-slmsmentioning

confidence: 99%

A review of liquid crystal spatial light modulators: devices and applications

Yang,

Forbes,

Cao

2023

OES

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“…In 2015, a quasi-continuous structure, namely a catenary structure, was proposed to overcome the challenges associated with discrete geometric phases 21 . The optical devices that impart a continuous phase to the incident light are known as "catenary diffractive waveplates " 22 .…”

Section: Introductionmentioning

confidence: 99%

Towards the performance limit of catenary meta-optics via field-driven optimization

Chen,

Ha,

Zhang

et al. 2024

OEA

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Catenary optics enables metasurfaces with higher efficiency and wider bandwidth, and is highly anticipated in the imaging system, super-resolution lithography, and broadband absorbers. However, the periodic boundary approximation without considering aperiodic electromagnetic crosstalk poses challenges for catenary optical devices to reach their performance limits. Here, perfect control of both local geometric and propagation phases is realized through field-driven optimization, in which the field distribution is calculated under real boundary conditions. Different from other optimization methods requiring a mass of iterations, the proposed design method requires less than ten iterations to get the efficiency close to the optimal value. Based on the library of shape-optimized catenary structures, centimeter-scale devices can be designed in ten seconds, with the performance improved by ~15%. Furthermore, this method has the ability to extend catenary-like continuous structures to arbitrary polarization, including both linear and elliptical polarizations, which is difficult to achieve with traditional design methods. It provides a way for the development of catenary optics and serves as a potent tool for constructing high-performance optical devices.

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Visualizing 3D Anisotropic Molecular Orientation in Polarization Holographic Optical Elements via Dielectric Tensor Tomography

Lee,

Son,

Hong

et al. 2024

Advanced Optical Materials

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The ability to unveil the spatial distribution of refractive index (RI) within volumetric holographic optical elements (HOEs) is critical for quantitating their diffractive behaviors. Angle‐resolved far‐field measurements of diffractive intensity have been prevalent toward this end. However, this century‐old approach is unable to directly visualize the spatial distribution of RI at mesoscopic scale. More significantly, visualization of molecular orientation within photoaddressable polymers (PAPs), which serve as standard recording media for polarization HOEs (pHOEs), remains uncharted territory. The recent advent of dielectric tensor tomography (DTT) has paved the way for full characterization of 3D anisotropic dielectric tensors, encompassing principal RIs and their optic axes. This study embarks on direct visualization of the 3D spatial distribution of anisotropic molecular orientations within holographically recorded PAPs. Illuminating these PAPs with polarized light at varying angles, the diffracted vector fields essential for reconstructing the dielectric tensor tomogram are captured. After diagonalizing the dielectric tensors, periodic rotations of the anisotropic molecule orientations can be visualized in the PAPs, which have never been achieved so far. The homogeneity of grating patterns produced under diverse manufacturing conditions is also examined and juxtaposed.

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Shortening Focal Length of 100‐mm Aperture Flat Lens Based on Improved Sagnac Interferometer and Bifacial Liquid Crystal

Cited by 9 publications

References 58 publications

A review of liquid crystal spatial light modulators: devices and applications

A review of liquid crystal spatial light modulators: devices and applications

Towards the performance limit of catenary meta-optics via field-driven optimization

Visualizing 3D Anisotropic Molecular Orientation in Polarization Holographic Optical Elements via Dielectric Tensor Tomography

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