Teacher-student learning of generative adversarial network-guided diffractive neural networks for visual tracking and imaging DOI Creative Commons
Hang Su,

Yanping He,

Baoli Li

и другие.

Advanced Photonics Nexus, Год журнала: 2024, Номер 3(06)

Опубликована: Ноя. 8, 2024

Efficiently tracking and imaging interested moving targets is crucial across various applications, from autonomous systems to surveillance. However, persistent challenges remain in fields, including environmental intricacies, limitations perceptual technologies, privacy considerations. We present a teacher-student learning model, the generative adversarial network (GAN)-guided diffractive neural (DNN), which performs visual of target. The GAN, as teacher empowers efficient acquisition skill differentiate specific target interest domains imaging. DNN-based student model learns master GAN. process obtaining GAN-guided DNN starts with capturing objects effectively using an event camera high temporal resolution low latency. Then, power GAN utilized generate data position-tracking capability for target, subsequently serving labels training DNN. image during while retaining target's positional information. Our experimental demonstration highlights efficacy expect can significantly enhance

Язык: Английский

Optical Information Encryption Based on Secret Sharing Liquid Crystal Elements with Spatial Dislocation DOI
Xin Xu,

Siyuan Qiao,

Yinghui Guo

и другие.

Laser & Photonics Review, Год журнала: 2024, Номер 18(10)

Опубликована: Май 3, 2024

Abstract Optical encryption is an increasingly significant technique in the realm of information security. In recent decade, there has been considerable interest using planar optics elements for encryption. However, leakage possibly occurs due to limited encrytion channels available single‐layer devices. To circumvent this problem, a novel method put forward secret sharing cascaded liquid crystal (LC) with spatial dislocation, which can produce near‐field patterns and far‐field holographic images under different illumination conditions. Specifically, Malus's Law its inherent one‐to‐four mapping rotational degeneracy, along Pancharatnam‐Berry (PB) phase introduced by LC molecules, achieve multi‐channel are utilized. Therefore, each unit manipulate amplitude imparted output light independently, thus only obtaining both devices decryption be realized. further enhance security, author purposely divide device into multiple regions find that encrypted recovered when two align precisely specific dislocation. These experimental measurements agree well design, demonstrating strong capability broad application prospects design approach field optical high cost‐effectiveness.

Язык: Английский

Процитировано

10

Information-hiding cameras: Optical concealment of object information into ordinary images DOI Creative Commons
Bijie Bai, Ryan H. Lee, Yuhang Li

и другие.

Science Advances, Год журнала: 2024, Номер 10(24)

Опубликована: Июнь 12, 2024

We introduce an information-hiding camera integrated with electronic decoder that is jointly optimized through deep learning. This system uses a diffractive optical processor, which transforms and hides input images into ordinary-looking patterns deceive/mislead observers. transformation valid for infinitely many combinations of secret messages, transformed output passive light-matter interactions within the processor. By processing these patterns, network accurately reconstructs original information hidden deceptive output. demonstrated our approach by designing cameras operating under various lighting conditions noise levels, showing their robustness. further extended this framework to multispectral operation, allowing concealment decoding multiple at different wavelengths, performed simultaneously. The feasibility was also validated experimentally using terahertz radiation. encoder–electronic decoder-based codesign provides high speed energy efficient camera, offering powerful solution visual security.

Язык: Английский

Процитировано

9

Metasurface‐generated Spin‐multiplexed & Grafted Perfect Vector Vortex Beams for High‐dimensional Optical Information Encryption DOI Open Access
Fang Yao, Hao Han,

Qingsong Wang

и другие.

Laser & Photonics Review, Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

Abstract Increasing the number of optical information encryption (OIE) layers can exponentially enhance its security, which requires introducing additional degrees freedom (DoFs) for light. However, traditional OIE systems encounter challenges due to exponential increases in volume and mass with expansion modulation DoFs, thereby retarding development integrated high‐security OIE. Here, a high‐dimensional dual‐layer (DLOIE) strategy is proposed experimentally established by utilizing novel metasurface‐generated beam, termed spin‐multiplexed grafted perfect vector vortex beam (MGPVVB). MGPVVB generated superposing beams programmable combinations topological charges (CTCs) across two orthogonally circularly polarized states. As key factor DLOIE, introduces new DoF called CTCs be customized within same polarization order (PO). The metasurface well‐suited generating MGPVVBs over wide bandwidth (450–1064 nm). all states on Poincaré sphere are generated. More importantly, DLOIE achieved through an array. For (true false) encoding based PO ellipticity, while verification authenticity governed distinctive CTCs. This advancement enhances security OIE, shows great value applications storage, communications, quantum processing.

Язык: Английский

Процитировано

1

Achromatic 3D Multi‐Color Orbital Angular Momentum Holography DOI Creative Commons
Hang Su, Baoli Li, Yu Bai

и другие.

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

Abstract Orbital angular momentum (OAM) holography represents a transformative technique for enhancing the information channel capacity of holographic systems through convolution theoretical infinite OAM states with discrete sampling target images. However, inherent axial chromatic aberration (ACA) in Fourier lens functions leads to misalignment planes OAM‐dependent holograms across different wavelengths, thereby limiting 3D multicolor holography. To address this challenge, novel approach achieving achromatic multi‐color using spatial multiplexing scheme is presented. Specifically, an optically digitalized hologram developed by superposing wavelength‐specific onto monochromatic holograms, followed high‐resolution discretization and interleaving via two‐photon lithography (TPL). Experimental results demonstrate that method enables double‐plane (along propagation direction light), 3‐color (633, 532, 460 nm), 3‐channel OAM‐multiplexing display (OAM order l en = 1,4, 7) ACA correction, utilizing nano‐printed featuring subwavelength (600 nm) pixel size. This breakthrough paves way high‐capacity, multi‐spectral data storage retrieval, significant implications augmented reality (AR)/virtual (VR) display, optical encryption, artificial intelligence.

Язык: Английский

Процитировано

1

Achromatic CMOS-Integrated Four-Bit Orbital Angular Momentum Mode Detector at Three Wavelengths DOI
Baoli Li,

Xiaonan Hu,

Zhiwen Mu

и другие.

Nano Letters, Год журнала: 2024, Номер 24(28), С. 8679 - 8686

Опубликована: Июль 1, 2024

The simultaneous detection of the orbital angular momentum (OAM) and wavelength offers new opportunities for optical multiplexing. However, because dispersion lens functions Fourier transformation, mode conversions at distinct wavelengths cannot be achieved in same plane. Here we propose an ultracompact achromatic complementary metal oxide semiconductor (CMOS)-integrated OAM detector. Specifically, a spatial multiplexed scheme, randomly interleaving phase distributions distributing superposed modes into preset positions wavelengths, is presented. In addition, such nanoprinted detector featuring microscale size short focal length can integrated onto CMOS chip. Consequently, four-bit incident light beams three discrete (633, 532, 488 nm) distinguished with high degree accuracy evaluated by average standardized Euclidean distance ∼0.75 between analytical target results. Our results showcase miniaturized platform achieving high-capacity information processing.

Язык: Английский

Процитировано

4

Ultracompact and Highly Sensitive Atomic Magnetometer Array via a Polarization Volume Grating-Based Waveguide Structure DOI

Yuzhuo Pei,

Chuang Wang, Q. Jing

и другие.

ACS Photonics, Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

Язык: Английский

Процитировано

0

Reprogrammable Vector Optical Field Meets Planar Liquid Crystal Elements for Enhanced Security in Holography DOI Open Access
Xin Xu,

Runzhe Zhang,

Yinghui Guo

и другие.

Laser & Photonics Review, Год журнала: 2025, Номер unknown

Опубликована: Март 16, 2025

Abstract As information security becomes an increasingly challenging and highly prioritized issue, optical holographic encryption has recently attracted significant attention. In particular, vector holography exploits the properties of light to overcome limitations traditional scalar holography, enhancing dimensionality improving security. However, current methods focus solely on design metasurfaces or liquid crystal (LC) devices, without fully considering interaction between incidence device, thereby limiting available channels. Vector field, which arbitrarily designed wavefronts polarization state distributions, provides greater degrees control than uniform field. this work, integrates with field propose secure by directly encoding into a reprogrammable incidence. This method involves dividing distributing secret among various carriers, namely LC analyzer. By orientation analyzer's transmission axis, multi‐channel is achieved utilizing static device. The proposal promising pathway for advancing encryption, strengthening authentication capabilities, overall

Язык: Английский

Процитировано

0

Dynamic control of bidirectional terahertz wavefront based on thermally active metasurfaces DOI
Xuyang Chen, Lijian Zhang, Peng Song

и другие.

Optics and Lasers in Engineering, Год журнала: 2025, Номер 191, С. 108992 - 108992

Опубликована: Апрель 9, 2025

Язык: Английский

Процитировано

0

Acoustic encryption with cascaded acoustic holography DOI
Qin Lin, Feiyan Cai, Jinwei Ye

и другие.

Science China Physics Mechanics and Astronomy, Год журнала: 2025, Номер 68(7)

Опубликована: Май 15, 2025

Язык: Английский

Процитировано

0

Multidimensional Photopatterning of Heterogeneous Liquid‐Crystal Superstructures Toward Higher‐Level Information Optics DOI

Si‐Jia Liu,

Yi‐Heng Zhang,

Rui Sun

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 26, 2025

Abstract Soft matter, featuring superior flexibility and intriguing tunability, has shown enormous potential in sensors, soft robots, light tailoring. However, limited by its inherent structural complexity, matter remains uncompetitive multidimensional high‐density information optics. Herein, a heterogeneous liquid‐crystal (LC) superstructure composed of interlocked nematic chiral LCs is designed to achieve higher‐dimensional control. Optically photopatterning with programmable UV polarization dosage proposed precisely customize both transverse longitudinal LC arrangements, bringing wide range light‐matter interactions within single micrometer‐thick film. The constructed not only enables simultaneous near‐field full‐color printing far‐field holography but also boasts brightness controllability selectivity. This low‐cost photonic structure high density ≈1.6 million hybrid‐dimensional optical data per square millimeter, unlocking new capabilities storage, display, encryption. work creates an ingenious bond between advanced technologies higher‐level informatics, pioneers soft‐matter‐mediated full‐dimensional

Язык: Английский

Процитировано

0