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7th Global Intelligent Industry Conference, GIIC 2024

作者： Zhu, Wenqing Xia, Liangping Zheng, Yang Yang, Zengbao Dang, Suihu Zhang, Man Qin, Lin Du, Chunlei School of Opto-electronic Engineering Changchun University of Science and Technology Jilin Changchun130022 China Key Laboratory of Micro Nano Optoelectronic Devices and Intelligent Perception Systems Yangtze Normal University Chongqing408100 China Zhuhai Multiscale Optoelectronics Technology Co. Ltd Zhuhai519060 China

ISBN: (纸本)9781510682986

Metalenses based on all-dielectric metasurfaces plays an important role in microscopic imaging, machine vision and holographic imaging. Chromatic aberration correction is an important factor that imaging devices. In this work, we propose an transmission achromatic metalens that can operate over a broad band of wavelengths. Based on the principle of phase compensation, the finite-difference time-domain method is used to calculate the wavefront of light for the design of the nano-units in the metalens with eliminating chromatic aberration. In the whole incident spectrum of visible light from 425 nm to 625 nm, The maximum focal shift of the achromatic metalens is about 7.9 %.And the average efficiency of the metalens with a numerical aperture of 0.6 is about 42 % in the wavelength band. © 2024 SPIE.

关键词： Aberrations

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Label-Free Evaluation of Treatment Efficacy in Laser Therapy by Terahertz Imaging

Label-Free Evaluation of Treatment Efficacy in Laser Therapy...

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Cross Strait Quad-Regional Radio Science and Wireless technology Conference (CSRWTC)

作者： Cong Xu Guanlong Wang Jia Shi Tianjin Key Laboratory of Optoelectronic Detection Technology and System School of Electronic and Information Engineering Tiangong University Tianjin China

Low-level laser therapy (LLLT) is a promising non-invasive treatment method in biomedical science. Rapid and high-sensitivity imaging evaluation of treatment efficacy in LLLT always remains changeling. To address this issue, here the confocal terahertz imaging is used to label-free evaluation of treatment efficacy in LLLT on ALI. The results show that terahertz imaging can effectively evaluate the therapeutic effect of LLLT on ALI with the advantages of high sensitivity.

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Utilizing a Synergistic Strategy that Combines Electromagnetic and Chemical Enhancement to Analyze the Sers Effect of the Fe3o4@Go@Ag on Pahs detection

SSRN

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SSRN 2024年

作者： Yang, Xu Shi, Yunbo Zhang, Haoze Chen, Zhaoyu Heilongjiang Province Key Laboratory of Laser Spectroscopy Technology and Application Harbin University of Science and Technology Harbin150080 China Key Laboratory of Optoelectronic Devices and Systems China Harbin Institute of Technology China

A comprehensive understanding of the enhancement mechanism of the substrate material is crucial to ensure the repeatability and functionality of SERS detection technology. Therefore, this study introduces a theoretical analysis method that integrates electromagnetic and chemical enhancement to achieve a comprehensive understanding of the SERS effect on the magnetic composite substrate. The visual model is employed in this study to comprehensively analyze and illustrate the electric field enhancement and optical effects of composite substrate materials. The study also elucidated the adsorption and charge transfer between the substrate material and target molecules. Based on this theory, Fe3O4@GO@Ag material was prepared and used to detect hydrophobic organic molecules such as polycyclic aromatic hydrocarbons (PAHs), with a concentration as low as 0.5nM. This study comprehensively analyzed the SERS enhancement effect of the composite substrate for the first time, and prepared a magnetic composite substrate material for the detection of hydrophobic organic molecules, opening up a new avenue for theoretical guidance and experimental exploration in SERS detection and analysis. © 2024, The Authors. All rights reserved.

关键词： Magnetite

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Architecture Optimized 6×6 Optical Switch Assisted with In-Line Non-Invasive Light Monitors

Architecture Optimized 6×6 Optical Switch Assisted with In-...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Xin Fu Zhao Wang Kai Zou Jiaqi Niu Yun Meng Siwei Liu Lin Yang Xiaolong Hu Key Laboratory of Optoelectronic Materials and Devices Institute of Semiconductors Chinese Academy of Sciences Beijing China School of Precision Instrument and Optoelectronic Engineering Tianjin University Tianjin China Key Laboratory of Optoelectronic Information Science and Technology Ministry of Education Tianjin China

A broadband thermo-optic switch with optimized architecture is demonstrated. The switch is calibrated in a very straightforward and effective manner by in-line non-invasive light monitors without apparent extra loss o... 详细信息

ISBN: (数字)9798350372076

ISBN: (纸本)9798350372083

关键词： Optical losses Switching systems Optical switches Optical distortion Insertion loss Lasers and electrooptics Monitoring

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Resin-Based Dielectric Terahertz Metalens and Applications

Resin-Based Dielectric Terahertz Metalens and Applications

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Cross Strait Quad-Regional Radio Science and Wireless technology Conference (CSRWTC)

作者： Jia Shi Guanlong Wang Cong Xu Tianjin Key Laboratory of Optoelectronic Detection Technology and System School of Electronic and Information Engineering Tiangong University Tianjin China

All-dielectric metalenses have become a research hotspot because of their high-efficiency and customizable features. Here, a resin-based dielectric metalens is designed by two-dimensional circumferential metagrating arrays for terahertz imaging beyond classical physical diffraction limit. The metalens is fabricated with UV -sensitive resin by a photo curing 3D printer. With the proposed scheme, the terahertz beam can be focused as a filamentous focal spot in sub-wavelength scale with a long depth of focus. As its demonstration in terahertz imaging applications, the printed transmission lines on the PCB board can be clearly imaged. The proposed metalens shows great potential in high-resolution 6G terahertz spatial sensing and imaging.

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Sensitivity-enhanced refractive index sensor based on exposed-core single-hole microstructured fiber 13

Sensitivity-enhanced refractive index sensor based on expose...

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13th International Conference on Information Optics and Photonics, CIOP 2022

作者： Li, Ye Wu, Jixuan Song, Binbin Zhang, Cheng Gao, Xinliang Huang, Kaixing Tianjin Key Laboratory of Optoelectronic Detection Technology and Systems School of Electronic and Information Engineering Tiangong University Tianjin300387 China Key Laboratory of Computer Vision and Systems Ministry of Education School of Computer Science and Engineering Tianjin University of Technology Tianjin300384 China

ISBN: (纸本)9781510660632

Microstructured fibers with geometric versatility, and exceptional guiding properties, show unique advantage in constructing high-performance sensors. In this paper, a sensitivity-enhanced fiber-optic sensor based on an exposed-core single-hole microstructured fiber (SHMF) is proposed and experimentally demonstrated for the refractive index (RI) measurement of liquid samples. Experimental results show that the RI sensitivity of the exposed-core microstructured fiber is 375.77 nm/RIU in the low-range of 1.3409~1.3522. With the advantages of enhanced light-matter interaction ability, tight light confinement and mechanical robustness, the proposed sensor based on exposed-core single-hole microstructured fiber offers great potential in biological and chemical sensing applications. © 2022 SPIE.

关键词： Fiber optic sensors

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High Sensitivity Integrated Optical Waveguide Electric Field Sensor Based on Lithium Niobate 14

High Sensitivity Integrated Optical Waveguide Electric Field...

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14th International Conference on Information Optics and Photonics, CIOP 2023

作者： Le, Qiu Yan, Song Bo, Peng Bao, Sun Shangjian, Zhang Zhiyao, Zhang Yong, Liu State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China Beijing Institute of Radio Metrology and Measurement Beijing100854 China

ISBN: (纸本)9781510671744

Electric field sensing has wide applications in electromagnetic compatibility, communication, electromagnetic radiation, wireless monitoring in aviation, ***. With the development of precision devices, there is a growing need to measure weak electric field in complex environments. Traditional electric field sensors, due to the presence of multiple metal electrodes, often suffer from interference with the measured field, making it difficult to accurately measure weak electric field in space and unsuitable for narrow space field measurements due to their large size. In order to solve these problems, this paper presents a high-sensitivity electric field sensing chip based on lithium niobate material. The sensing chip adopts the Michelson interference for the sensing measurement of electric field. The sensor was designed for high sensitivity measurement at specific frequency. To demonstrate the versatility of the proposed solution, two target frequencies of 10 GHz and 12 GHz were designed to analyze the frequency response of various antenna parameters based on a tapered dipole antenna structure Based on the simulation. We fabricated electric field sensing chips with dimensions consistent with the simulation, parameters of dipole lengths 1.5 mm and 2 mm, and modulation electrode lengths of 4.4 mm and 5 mm were determined to fabricate the proposed chip. The fabricated chip size was 23.2mm × 4.6mm × 1.5mm. The experimental results demonstrated that the electric field sensing chips exhibited good linearity. Under the condition that the signal-to-noise ratio of 10dB, the measured sensitivities of the two sensing chips at their respective resonant frequencies were 41.6μV/m and 32.7μV/m. © 2023 SPIE.

关键词： Electric fields

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Brain image pathological segmentation method based on a deep network 2

Brain image pathological segmentation method based on a deep...

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2nd International Conference on Medical Imaging and Additive Manufacturing, ICMIAM 2022

作者： Zheng, Shuzhan Xu, Gang Fu, Nana Key Laboratory of Advanced Perception and Intelligent Control of High-end Equipment Anhui Polytechnic University Anhui China Anhui Key Laboratory of Detection Technology and Energy Saving Devices Anhui Polytechnic University Anhui China

ISBN: (纸本)9781510653375

The automation of the medical industry has become one of the necessary conditions in today's medical field. Radiologists or physicians need this automation technology for accurate diagnosis and treatment. Automatic segmentation of tumor parts from magnetic resonance (MR) brain images is a challenging task. Several methods have been developed to improve the segmentation efficiency of automation systems. However, in the process of medical image segmentation, there is always room for improvement. This paper proposes a brain tumor image segmentation method based on deep learning, which includes the concepts of stationary wavelet transform (SWT) and growing convolutional neural network (GCNN). The vital goal of this work is to improve the accuracy of traditional systems. In this paper, the support vector machine (SVM) and convolutional neural network (CNN) are compared and analyzed. The experimental results show that this method is superior to SVM and CNN inaccuracy, peak signal-To-noise ratio, mean square error, and other performance indicators. © 2022 SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Support vector machines

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Organic-Perovskite Bilayer Color Conversion Media for Full-Color Displays

Organic-Perovskite Bilayer Color Conversion Media for Full-C...

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International Conference on Display technology, 2024

作者： Liu, Siyang Ting Tam, Bryan Siu Zhu, Mingchao Ye, Fanghao Yan Yeung, Fion Sze Li, Guijun Dong, Shou-Cheng State Key Laboratory of Advanced Displays and Optoelectronics Technologies Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Kowloon Hong Kong Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province Shenzhen University Shenzhen China Institute for Advanced Study Hong Kong University of Science and Technology Kowloon Hong Kong Co. Ltd. Suzhou China

Color conversion media (CCM) are crucial for realizing cost-effective, high-resolution micro-LED and OLED displays. In this work, we developed green and red organic-perovskite bilayer CCM that combine the PLQY and color purity of perovskite quantum dots (PeQDs) and the strong blue absorption of perylene-based organic emitters. The bilayer with thickness of 300 nm showed over 99% blue absorption and PLQY of 77% and 61% for green and red CCM, respectively. © 2024 John Wiley and Sons Inc. All rights reserved.

关键词： Perovskite

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Simulation Research on Laser Transmission Characteristics in Inclined Turbulent Atmosphere 2

Simulation Research on Laser Transmission Characteristics in...

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2nd International Conference on Laser, Optics and optoelectronic technology, LOPET 2022

作者： Yang, Xiaoce Wang, Chunyang Xi＇an Key Laboratory of Active Photoelectric Imaging Detection Technology Xi'an Technological University Xi'an710021 China School of Optoelectronic Engineering Xi'an Technological University Xi'an710021 China

ISBN: (纸本)9781510657588

In this paper, a simulation experiment is done to study the influence of atmospheric turbulence on the laser beam in the process of oblique transmission. The horizontal random atmospheric turbulence phase screen group is generated by using the power spectrum inversion method plus sub-harmonic compensation method, and the position distribution of the phase screen on the inclined transmission path is corrected by combining the atmospheric refractive index structure parameters that vary with height. Atmospheric turbulence phase screen set suitable for simulating slant laser transmission. Through simulation, the far-field light intensity distribution of the inclined transmission phase screen group and the horizontal transmission phase screen group is compared. The results show that, compared with the horizontal atmospheric turbulence phase screen group that does not consider the atmospheric refractive index structure parameter changing with height, the far-field light spot of the laser beam after passing through the oblique transmission phase screen group is more obvious, and the light intensity attenuation is more serious. The modified slope phase screen group is more accurate in simulating the effect of atmospheric turbulence on the laser beam. © 2022 SPIE.

关键词： Atmospheric turbulence

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