Article
Optics
Chi Zhang, Min Jiang, Yao Chang, Yang Liu, Guanghui Wang, Fei Xu, Yanqing Lu
Summary: This Letter proposes a novel metasurface conveyor belt using arrays of gold plasmonic elliptical elements for trapping, transporting, and sorting particles. By switching the polarization of the excitation beam, the elements can be continuously lit, providing a larger trapping area. The design offers a new scheme for particle sorting in optofluidic applications.
Review
Chemistry, Multidisciplinary
Chunghwan Jung, Gyeongtae Kim, Minsu Jeong, Jaehyuck Jang, Zhaogang Dong, Trevon Badloe, Joel K. W. Yang, Junsuk Rho
Summary: Traditional OVDs face risks in the face of increasing counterfeit threats; Metasurfaces, as candidates for the new generation of OVDs, exhibit multiple optical responses and provide a more robust solution for optical anti-counterfeiting; mOVDs have multiple optical responses, are difficult to reverse engineer, and are key points of discussion in terms of fabrication methods and classification.
Article
Engineering, Multidisciplinary
Mengchao Zhang, Hao Shi, Yuan Zhang, Yan Yu, Manshan Zhou
Summary: This study proposes a new detection method based on the improved Yolov3 algorithm for mining conveyor belt damage, using EfficientNet as the backbone feature extraction network to balance network depth, width, and image resolution, achieving an accuracy of 97.26%. The improved algorithm balances detection speed and accuracy, with a detection speed of 42 FPS and mean average precision of 97.26%.
Article
Materials Science, Multidisciplinary
Jinxing Li, Guohui Yang, Yueyi Yuan, Qun Wu, Kuang Zhang
Summary: This paper proposes an ultra-thin metasurface-based superoscillatory lens that can generate a sub-diffraction optical needle with a long focal depth. The lens has the advantages of simple fabrication, high efficiency, and low-profile design.
FRONTIERS IN MATERIALS
(2022)
Article
Multidisciplinary Sciences
Yuzhou Ran, Lihua Shi, Shuran Wu, Bo Fan, Xin Jin, Dedong Ji, Yao Ma, Jie Li, Yicheng Liu, Jianbao Wang
Summary: An optically transparent low-scattering metasurface combining polarization conversion, diffusion, and absorption mechanisms is proposed in this paper. By optimizing the reflection coefficient of a polarization conversion absorbing meta-atom and arranging the meta-atom and its orthogonal structural meta-atom according to a random coding sequence, the design concept of co-polarization absorption and cross-polarization diffusion is realized. The simulation results show good agreement with the measured results, demonstrating significant reduction in Radar Cross Section (RCS) in both the co-polarized and cross-polarized directions.
ADVANCED THEORY AND SIMULATIONS
(2022)
Article
Materials Science, Multidisciplinary
Yao Ma, Jianbao Wang, Lihua Shi, Shuyun Xue, Yuzhou Ran, Jie Li, Yicheng Liu
Summary: This paper introduces an ultra-wideband microwave metasurface absorber with optically transparent and flexible properties, achieving absorption higher than 90% in a wide frequency band. The use of double-layer dielectric substrate expands the microwave absorption bandwidth and improves oblique incident properties. The metasurface is also polarization-insensitive and suitable for radar stealth applications.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Engineering, Electrical & Electronic
Teng Li, Jingwen Sun, Hongfu Meng, Yizhu Shen, Sanming Hu, Wenbin Dou, Zhi Ning Chen, Thomas Zwick
Summary: This article introduces a dual-polarized double-layer metasurface lens using split dipole unit cells. It achieves a wide phase range and high transmission coefficient amplitude, performing well in experimental verification at 30 GHz.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Physics, Multidisciplinary
Yongkang Song, Weici Liu, Xiaolei Wang, Faqiang Wang, Zhongchao Wei, Hongyun Meng, Ning Lin, Hongqiang Zhang
Summary: This paper designs a temperature-controllable multifunctional Metasurface lens and a polarization-sensitive intensity-tunable metalens, which can achieve focus adjustment under different polarization states and change in output light intensity.
FRONTIERS IN PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Haisheng Wu, Qingji Zeng, Xinrou Wang, Canming Li, Zebin Huang, Zhiqiang Xie, Yanliang He, Junmin Liu, Huapeng Ye, Yu Chen, Ying Li, Dianyuan Fan, Shuqing Chen
Summary: A multidimensional multiplexing communication system was designed using vortex beams carrying orbital angular momentum. The system successfully achieved multiplexing and demultiplexing of wavefront modes and polarization channels, and transmitted 400 Gbit/s QPSK signals.
Article
Chemistry, Analytical
Ying Tian, Lichang Han, Li Yan, Jiayun Wang, Binzhen Zhang, Zan Jiao
Summary: In this paper, an optically-controlled multifunctional linear polarization conversion metasurface working in the terahertz band is proposed. The metasurface, designed with a multilayer structure and controlled by a photosensitive semiconductor, can achieve broadband reflection and transmission polarization conversion functions. The stability of the metasurface to structural parameters and incident angles is also discussed.
Article
Optics
Xiujuan Zou, Guangxing Gong, Yu Lin, Boyan Fu, Shuming Wang, Shining Zhu, Zhenlin Wang
Summary: Polarization imaging is highly useful in various applications and a compact metasurface-based polarization color router has been designed and realized. This device shows a micron Bayer pattern under white light illumination with any polarization and can act as a polarizer. The measured light utilization efficiency reaches 88% and the correlation coefficient between measured and theoretical illuminating light polarization angles is 0.98. This lightweight device with high light utilization efficiency and polarization-integrated detection functions provides a new way for integrated CMOS image sensor applications.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Piotr Bortnowski, Robert Krol, Maksymilian Ozdoba
Summary: This study presents a method for detecting damage to rollers based on transverse vibration signals measured on a conveyor belt, and verifies its feasibility and effectiveness through laboratory and in-situ tests.
EKSPLOATACJA I NIEZAWODNOSC-MAINTENANCE AND RELIABILITY
(2022)
Article
Physics, Applied
Yaping Hou, Jianyong Mao, Tianlun Li, Yunfan Xu, Weitao Jiang, Yanpeng Zhang, Lei Zhang
Summary: An all-optical approach is proposed to actively control the polarization state of near-infrared light at the nanoscale using a nonlinear metasurface. By exploiting the intense refractive index change of epsilon-near-zero (ENZ) materials, the phase difference between two orthogonal electric fields at ENZ wavelength can be continuously tuned by varying the incident light power. This allows the polarization state of the reflected light to be actively tuned from linear to circular state. The proposed all-optical approach holds promise for tunable photonic functionalities in practical applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Optics
Shengchao Gong, Mengxin Ren, Wei Wu, Wei Cai, Jingjun Xu
Summary: Spatial light modulators are devices used to modulate amplitude, phase, or polarization of light beams, considered as the backbone for optical information processing and future optical computing. The MS-OASLM, based on metasurface, achieves higher resolution than typical SLMs through nonlinear polarization control, offering potential for next generation all-optical information processing and high resolution display technologies.
PHOTONICS RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Chunhua Xue, Qingqi He, Teng Li, Xi Gao
Summary: In this paper, 1-bit dual-polarized ultra-thin lens antennas based on Huygens' principle are presented. By tuning the transmission phase compensation in different states, the design and measurement of various single-beam patterns are achieved. The results show that the proposed antenna performs well in transmission within a specific frequency range.
FRONTIERS IN MATERIALS
(2022)
Article
Optics
Jiahao Chen, Chaoyi Li, Luyao Sun, Lingling Ma, Bingxiang Li, Yanqing Lu
Summary: Electric fields can modify the optical properties of nematic liquid crystals by changing their molecular orientation, enabling electro-optic applications. However, in some cases, this optical change is undesirable. We experimentally show that polymer stabilization can weaken the birefringence change caused by electrically modified order parameters, which is beneficial for liquid crystal devices where birefringence change is unfavorable.
CHINESE OPTICS LETTERS
(2022)
Article
Optics
Shuang Zhou, Jie Bian, Peng Chen, Mo Xie, Jie Chao, Wei Hu, Yanqing Lu, Weihua Zhang
Summary: Circular dichroism spectroscopy is a crucial tool in nanoscopic chiroptics, but there is a lack of a simple, fast, and reliable method for measuring the circular dichroism responses of single nanostructures. In this study, a polarization-dispersive imaging spectrometer capable of measuring the scattering circular dichroism response of a single chiral nanostructure with a single shot is reported. Experimental and theoretical results indicate that the spectrometer measures the imaginary part of nonlocal susceptibility of the structure. Rich chiroptical phenomena were observed at the single nanostructure level using this technique.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Hanqi Zhang, Hengtian Zhu, Qi Wu, Ye Chen, Rong Wang, Fei Xu, Ke Xiong
Summary: In this study, a microfiber Bragg grating (MFBG) bonded using tapered cantilever was designed and investigated using experimental, theoretical, and numerical methods. The tapered structure amplified the ultrasonic signal and eliminated the influences of static strain and evanescent field using the cantilever. Compared to the cantilevered fiber Bragg grating, the sensitivity of the sensor showed an upward trend with decreasing diameter, with 331% and 108% sensitivity increments observed for MFBGs with 20 and 40 μm diameters, respectively. The improvement was particularly apparent at high frequencies of the ultrasonic signal.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Yifeng Xiong, Zixuan Ding, Fei Xu
Summary: The integration of silica optical fibers with optoelectronic materials and electrical structures enables the development of miniaturized and multifunctional all-fiber optoelectronic systems. The flat endface of an optical fiber tip provides a platform for optoelectronic integration through micro- and nano-fabrication techniques. The rapid development of fiber-compatible fabrication technologies and the wide range of applications for active fiber tips, including photodetection, modulation, lasing, sensing, and light-emitting, are discussed in this paper. Challenges and opportunities for future development in this field are also addressed.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Run-ze Zhu, Hao-gong Feng, Yi-feng Xiong, Liu-wei Zhan, Fei Xu
Summary: We have demonstrated all-fiber reflective single-pixel imaging with a long working distance and large field of view. By using wavelength-dependent multimode fiber speckle to illuminate the object, the system is made compact and stable. With collimated MMF speckle patterns and an optical fiber receiving device, we achieved reflective optical fiber single-pixel imaging with a working distance of over 5 mm and a field of view of about 9 mm2. By employing compressed sensing, object images can be reconstructed with a sampling rate of about 4%. This work provides a method and reference for practical applications of optical fiber endoscopic imaging with requirements for a long working distance and large field of view.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Run-ze Zhu, Hao-gong Feng, Fei Xu
Summary: Multimode optical fiber (MMF) imaging is an emerging technology that allows for multispectral and polarimetric imaging. By controlling the wavelength and polarization, different channels can be constructed. With neural network training, image reconstruction and channel classification can be achieved with high accuracy and similarity.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Min Jiang, Zelin Guo, Haonan Li, Xiaodan Liu, Feng Xu, Guanghui Wang
Summary: This letter proposes a plasmonic conveyor belt based on periodically arranged graphene nanorings (GNRs) with different sizes. By electrically tuning the Fermi level of graphene, the hot spots on the GNRs can be continuously illuminated, allowing for the trapping and transporting of nanoparticles under uniform Mid-infrared or terahertz light excitation. The rotational symmetry of the GNRs provides advantages over designs consisting of graphene strips, and the feasibility of particle separation is demonstrated. Numerical analysis confirms that this design offers an optimized scheme for polarization-independent and electrically tunable plasmonic conveyor belts, which can be used in various on-chip optofluidic applications.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Optics
Mengmeng Chen, Runze Zhu, Junxian Luo, Ali Masoudi, Ye Chen, Gilberto Brambilla, Fei Xu
Summary: Distributed vibration sensors (DVSs) are widely used in industrial production. This study demonstrates that the strain dynamic range of DVSs can be improved by analyzing the harmonic numbers in the vibration response spectrum, enabling quantitative measurement of vibration amplitude with a strain resolution of 0.78 mu epsilon for each additional harmonic.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Junxian Luo, Hanwen Liu, Huan Xing, Runze Zhu, Zhuo Chen, Fei Xu
Summary: In recent years, dexterous robotic hands have become indispensable in intelligent equipment. The use of bionic neurons that provide finger motion perception improves joint control accuracy. By utilizing series- and parallel-integrated inner cladding fiber Bragg gratings (ICFBG) as bionic neurons, the proposed fiber-optic neurons (FON) can achieve multi-joint bending perception in a robotic finger. The FONs are insensitive to temperature and axial strain and can potentially be utilized in robotic gesture recognition and control systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Editorial Material
Engineering, Electrical & Electronic
Gaozhi (George) Xiao, Tuan Guo, Fei Xu, Francesco Chiavaioli
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Zixuan Ding, Guorui Wang, Yifeng Xiong, Ye Chen, Fei Xu
Summary: An all-fiber dual-comb laser with a high repetition rate and repetition rate difference was demonstrated in this study. The laser generates asynchronous combs based on the high birefringence of the fiber and achieves a larger repetition rate difference compared to previous work. This laser exhibits good stability and coherence, which has the potential to enhance the acquisition rate and accuracy of dual-comb measurement systems.
Article
Nanoscience & Nanotechnology
Runze Zhu, Junxian Luo, Xinxin Zhou, Haogong Feng, Fei Xu
Summary: Multimode fiber (MMF) imaging is a new field of fiber imaging technology that has emerged in the last few decades. However, its sensitivity to dynamic perturbance limits its practical applications. In this study, an anti-perturbation scheme for MMF imaging based on active measurement of the fiber configuration is proposed. Experimental results show that the introduction of fiber configuration parameters can improve the quality of anti-perturbation imaging. Additionally, speckle prediction using the configuration parameters and a trained neural network is realized.
Article
Optics
Shu Xin, Lu Yingshen, Zhang Zifa, Kang Jiaxing, Yuan Xiang, Hong Feng, Xu Run, Ma Zhongquan, Xu Fei
Summary: In this study, high-quality CsPbIBr2 thick films were successfully prepared by pneumatic spraying via an interfacial seed layer modification strategy under an atmospheric environment with RH below 90%. The introduction of interfacial seed layers improved the crystallinity, interfacial contact, and structural stability of the CsPbIBr2 thick films. The photodiode-type CsPbIBr2 photodetectors showed low dark current, high performance photodetection parameters, and resistance to water and oxygen.
ACTA OPTICA SINICA
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Ling Hao, Zhenlan Dou, Fei Xu, Lei Chen, Qun Chen, Yong Min, Chunyan Zhang
Summary: The increasing proportion of renewable energy poses challenges to power grid in ensuring power supply. A large-scale ice-storage-based district cooling system and run-of-river hydropower can effectively reduce electricity load during peak periods. This paper establishes an integrated electricity and heat dispatch model considering ice storage systems and run-of-river hydropower, and analyzes the power supply ensuring effects of the combined systems under different operation strategies. Furthermore, multi-agent economic analyses are conducted to evaluate investments in ice storage equipment by cooling users, power grid, or third-party.
2023 5TH ASIA ENERGY AND ELECTRICAL ENGINEERING SYMPOSIUM, AEEES
(2023)
Article
Optics
Danran Li, Nina Wang, Tianyang Zhang, Guangxing Wu, Yifeng Xiong, Qianqian Du, Yunfei Tian, Weiwei Zhao, Jiandong Ye, Shulin Gu, Yanqing Lu, Dechen Jiang, Fei Xu
Summary: The research introduces a label-free nanosensor based on a fiber taper and zinc oxide nanogratings which enables monitoring of internal cellular apoptosis processes. It not only contributes to understanding internal environmental variations during cellular apoptosis, but also provides a new platform for investigating cellular events and understanding fundamental cell biochemical engineering with nonfluorescent fiber devices.
ADVANCED PHOTONICS
(2022)
