Query：
学者姓名：常卫杰
Refining：
Year
Type
Indexed by
Source
Complex
Former Name
Co-
Language
Clean All
Abstract ：
Incoherent optical spatial differentiation may allow high speed, low computational power and low latency image processing. However, it is a great challenge to directly design an optical convolutional kernel containing negative values for image differentiation. Therefore, polarization or wavelength-multiplexed bipolar point spread functions (PSFs) followed by digital subtraction is proposed to achieve incoherent optical edge detection. Unfortunately, these methods will increase the device design complexity and only support single isotropic edge detection. Here we proposed and experimentally demonstrated a single-shot incoherent multifunctional image differentiation with spatial tiling optical convolution. As a proof of concept, we specially designed four spatial tiling non-negative optical convolutional kernels based on 4f system through inverse design method, and simultaneously realized three types of spatial differential operators. The x and y directions spatial differentiation and isotropic edge detection can be experimentally demonstrated simultaneously after digital subtraction. Our solution is capable of relaxing device complexity, increasing scalability and facilitating intelligent design, which is of great significance for accelerating machine vision tasks under incoherent illumination.
Keyword ：
Edge detection Edge detection Inverse design Inverse design Multifunction Multifunction Optical convolution Optical convolution Spatial differentiation Spatial differentiation
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Huang, Feng , Zhu, Guofeng , Chang, Weijie et al. Single-shot incoherent multifunctional image differentiation with spatial tiling optical convolution [J]. | OPTICS AND LASER TECHNOLOGY , 2025 , 188 . |
| MLA | Huang, Feng et al. "Single-shot incoherent multifunctional image differentiation with spatial tiling optical convolution" . | OPTICS AND LASER TECHNOLOGY 188 (2025) . |
| APA | Huang, Feng , Zhu, Guofeng , Chang, Weijie , Sun, Cheng , Wang, Hewen , Yi, Baoliang et al. Single-shot incoherent multifunctional image differentiation with spatial tiling optical convolution . | OPTICS AND LASER TECHNOLOGY , 2025 , 188 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Femtosecond laser has emerged as a valuable tool for the fabrication of optical fiber sensors with novel microstructures, due to its ultrashort pulse width and extremely high peak intensity. By focusing the laser beam within materials, nonlinear interaction is induced within the focal volume, enabling the manufacture of unprecedented microstructure fibers. In this review, we give a comprehensive introduction to the emerging fiber optic biochemical sensors realized by femtosecond laser technology. Firstly, we discuss three processing schemes and their corresponding advantages according to the different fabrication effects, which involves undeformative, subtractive, and additive processing. Additionally, benefited from adaptive optics, the precision and flexibility of fiber micro-fabrication can be enhanced by the multi-dimensional dynamic modulation of pulsed beams. Subsequently, we summarize all-in-fiber biochemical sensors fabricated by femtosecond laser in terms of operation principles, device structures, fabrication methods, and innovative biochemical functionalities, respectively. Finally, we evaluate the advantages of femtosecond laser processing for fiber sensor fabrication over existing manufacturing technologies, and discuss the challenges and potential opportunities for biochemical applications.
Keyword ：
Adaptive optics Adaptive optics Biochemical sensors Biochemical sensors Femtosecond laser Femtosecond laser Label-free Label-free Microstructure Microstructure
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Chang, Weijie , Xu, Shengyao . All-in-fiber label-free biochemical sensors by femtosecond laser processing [J]. | CERAMICS INTERNATIONAL , 2025 , 51 (1) . |
| MLA | Chang, Weijie et al. "All-in-fiber label-free biochemical sensors by femtosecond laser processing" . | CERAMICS INTERNATIONAL 51 . 1 (2025) . |
| APA | Chang, Weijie , Xu, Shengyao . All-in-fiber label-free biochemical sensors by femtosecond laser processing . | CERAMICS INTERNATIONAL , 2025 , 51 (1) . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
RGBD cameras that capture color and depth information have a wide range of applications such as robotics, autonomous driving, and cons umer electronics. Traditional RGBD imaging usually requires multi-cameras or extra active illumination which inevitably leads to bulky or complex imaging systems, hindering the growing demand for compact integrated optical devices. Optical metasurface have emerged as a powerful substitute to the traditional diffractive optical element due to the superior dispersion manipulation and extremely compact size. However, it is still a great challenge to realize a single-shot monocular metasurface camera, due to the strong and unignorable wavelength-dependent aberrations. In this work, we demonstrate an end-to-end compact single-shot monocular metasurface camera for RGBD imaging. By utilizing end-to-end joint optimization framework to learn metasurface physical structure in conjunction with deep neural networks reconstruction algorithm, the multidimensional light field information RGBD of a scene in a single shot can be reconstructed within a depth range of 0.5 m. Compared with traditional lens-based RGBD imaging, our proposed metasurface-based imaging achieves an improvement of about 2 dB in chromatic imaging and a 4 times increase in depth estimation accuracy. Our proposed scheme could facilitate the further development of the intelligent computational meta-optics in diverse fields ranging from machine vision to biomedical imaging.
Keyword ：
Computational imaging Computational imaging End -to end joint optimization End -to end joint optimization Metasurface Metasurface RGBD imaging RGBD imaging
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Xu, Shengyao , Chi, Chuirong , Zheng, Shuang et al. End-to-end optimization of single-shot monocular metasurface camera for RGBD imaging [J]. | OPTICS COMMUNICATIONS , 2024 , 566 . |
| MLA | Xu, Shengyao et al. "End-to-end optimization of single-shot monocular metasurface camera for RGBD imaging" . | OPTICS COMMUNICATIONS 566 (2024) . |
| APA | Xu, Shengyao , Chi, Chuirong , Zheng, Shuang , Chang, Weijie , Huang, Feng . End-to-end optimization of single-shot monocular metasurface camera for RGBD imaging . | OPTICS COMMUNICATIONS , 2024 , 566 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Objective Chiral-effect-based metasurfaces provide a new solution for the design of circular polarized light (CPL) detectors due to their high design flexibility and compact structure. However, the design of polarization-sensitive chiral metasurfaces still faces challenges in high bandwidth, high circular dichroism (CD), and high extinction ratios. To further enhance the extinction ratio performance of infrared circular polarization detectors and achieve higher CD and extinction ratios over a wide bandwidth, we propose a silicon-based two-dimensional chiral metasurface for circular polarization detection, thereby promoting the practical application of circular polarization detection. Methods We design and propose a high-performance, broadband all-dielectric two-dimensional chiral metasurface for circular polarization detection, thus achieving high bandwidth, high CD, and high transmittance. Firstly, a chiral meta-atom with a high degree of freedom is introduced, composed of a lateral rectangle and two pairs of center-symmetric trapezoids, one large and one small (trapezoid (1) and trapezoid (2)). Subsequently, based on the finite-difference time-domain method, an optimization objective function targeting high CD is established. Meanwhile, a chaotic particle swarm optimization algorithm is employed to conduct a global search in high-dimensional space, ultimately leading to a high-performance chiral metasurface for circular polarization detection. Results and Discussions The designed infrared broadband chiral metasurface enables efficient transmission of left-handed circularly polarized (LCP) incident light, achieving maximum transmittance of 95 %. After passing through the chiral metasurface, the polarization state of LCP light is converted to right-handed circularly polarized (RCP) light, with extinction effects on RCP incident light shown (Figs. 2 and 3). When LCP light is incident, the device demonstrates high transmittance characteristics due to strong coupling effects and localized field enhancement between the LCP light and the metasurface structure, whereas it exhibits high reflectance characteristics under RCP incidence (Fig. 4). By adjusting the geometric parameters of the device, both the operating bandwidth and CD can be tuned (Fig. 5). Given the current levels of micro-nano fabrication technology, we further analyze the influence of the sharp tip structure of the meta-atom on the device's CD. The results indicate that rounding the tip reduces the extinction ratio at 1.65 mu m, with minimal influence on the device's CD within the operating bandwidth, thus demonstrating sound manufacturability (Fig. 6). Conclusions We design a silicon-based all-dielectric chiral metasurface for circular polarization detection, thereby achieving extinction ratio performance superior to that of other reported two-dimensional chiral metasurface devices for circular polarization detection. Additionally, it can function as a half-wave plate for LCP light while blocking the transmission of RCP light within the continuous wavelength range of 1416-1742 nm. The maximum circular dichroism reaches 0.94, the maximum extinction ratio (ER) is 42 dB, and the transmittance is 95 %, with excellent polarization characteristics shown at 1.65 mu m. The designed all-dielectric two-dimensional chiral metasurface possesses features such as high bandwidth, high transmittance, high CD, and easy manufacturing. It can be fabricated by adopting semiconductor manufacturing techniques compatible with standard CMOS technology, thereby presenting significant application potential in near-infrared polarization detection and on-chip polarization imaging systems.
Keyword ：
circular dichroism circular dichroism circular polarization circular polarization extinction ratio extinction ratio metasurface metasurface polarization detection polarization detection
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Chang, Weijie , Lin, Xiaohui , Li, Jinping et al. Design of Infrared Broadband All-Dielectric Chiral Metasurface for Circular Polarization Detection [J]. | ACTA OPTICA SINICA , 2024 , 44 (23) . |
| MLA | Chang, Weijie et al. "Design of Infrared Broadband All-Dielectric Chiral Metasurface for Circular Polarization Detection" . | ACTA OPTICA SINICA 44 . 23 (2024) . |
| APA | Chang, Weijie , Lin, Xiaohui , Li, Jinping , Huang, Feng , Xu, Shengyao . Design of Infrared Broadband All-Dielectric Chiral Metasurface for Circular Polarization Detection . | ACTA OPTICA SINICA , 2024 , 44 (23) . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
An image reconstruction algorithm is vital for the image quality of a photonic integrated interferometric imaging (PIII) system. However, image reconstruction algorithms have limitations that always lead to degraded image reconstruction. In this paper, a novel image reconstruction algorithm based on deep learning is proposed. Firstly, the principle of optical signal transmission through the PIII system is investigated. A dataset suitable for image reconstruction of the PIII system is constructed. Key aspects such as model and loss functions are compared and constructed to solve the problem of image blurring and noise influence. By comparing it with other algorithms, the proposed algorithm is verified to have good reconstruction results not only qualitatively but also quantitatively.
Keyword ：
Deep learning Deep learning Image reconstruction Image reconstruction Optical imaging Optical imaging Optical interferometry Optical interferometry Photonic integrated circuits Photonic integrated circuits
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Xu, Qianchen , Chang, Weijie , Huang, Feng et al. Image Reconstruction Method for Photonic Integrated Interferometric Imaging Based on Deep Learning [J]. | CURRENT OPTICS AND PHOTONICS , 2024 , 8 (4) : 391-398 . |
| MLA | Xu, Qianchen et al. "Image Reconstruction Method for Photonic Integrated Interferometric Imaging Based on Deep Learning" . | CURRENT OPTICS AND PHOTONICS 8 . 4 (2024) : 391-398 . |
| APA | Xu, Qianchen , Chang, Weijie , Huang, Feng , Zhang, Wang . Image Reconstruction Method for Photonic Integrated Interferometric Imaging Based on Deep Learning . | CURRENT OPTICS AND PHOTONICS , 2024 , 8 (4) , 391-398 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
针对偏振探测手性超构表面难以实现大带宽、高圆二色性和高消光比的设计挑战,利用粒子群算法设计出一种硅基全介质二维手性超构表面.仿真结果表明,该器件在1416～1742 nm的工作波段内可作为左旋圆偏振光的二分之一波片并阻挡右旋圆偏振光的透射,平均圆二色性值为0.72且最大值达0.94,消光比达42 dB,透射率达95％,同时实现了高透过率、高圆二色性以及大带宽,且具有易制造、易集成等优点.
Keyword ：
偏振探测 偏振探测 圆二色性 圆二色性 圆偏振 圆偏振 消光比 消光比 超构表面 超构表面
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 常卫杰 , 林晓晖 , 李晋平 et al. 红外宽带圆偏振探测全介质手性超构表面设计 [J]. | 光学学报 , 2024 , 44 (23) : 245-251 . |
| MLA | 常卫杰 et al. "红外宽带圆偏振探测全介质手性超构表面设计" . | 光学学报 44 . 23 (2024) : 245-251 . |
| APA | 常卫杰 , 林晓晖 , 李晋平 , 黄峰 , 徐圣瑶 . 红外宽带圆偏振探测全介质手性超构表面设计 . | 光学学报 , 2024 , 44 (23) , 245-251 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Optical fiber sensors working at the dispersion turning point (DTP) have served as promising candidates for various sensing applications due to their ultrahigh sensitivity. In this review, recently developed ultrasensitive fiber sensors at the DTP, including fiber couplers, fiber gratings, and interferometers, are comprehensively analyzed. These three schemes are outlined in terms of operation principles, device structures, and sensing applications. We focus on sensitivity enhancement and optical transducers, we evaluate each sensing scheme based on the DTP principle, and we discuss relevant challenges, aiming to provide some clues for future research.
Keyword ：
dispersion turning point dispersion turning point fiber coupler fiber coupler fiber grating fiber grating interferometer interferometer optical fiber sensor optical fiber sensor sensitivity enhancement sensitivity enhancement
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Xu, Shengyao , Kang, Peng , Hu, Zhijie et al. Ultrasensitive Optical Fiber Sensors Working at Dispersion Turning Point: Review [J]. | SENSORS , 2023 , 23 (3) . |
| MLA | Xu, Shengyao et al. "Ultrasensitive Optical Fiber Sensors Working at Dispersion Turning Point: Review" . | SENSORS 23 . 3 (2023) . |
| APA | Xu, Shengyao , Kang, Peng , Hu, Zhijie , Chang, Weijie , Huang, Feng . Ultrasensitive Optical Fiber Sensors Working at Dispersion Turning Point: Review . | SENSORS , 2023 , 23 (3) . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
超透镜除了可以实现传统透镜的聚焦和成像功能之外，还可通过对超构单元的设计实现对光场偏振、波长和振幅等的多维度操控，由于体积薄、重量轻、成本低、易集成，其在光电子器件领域中开始崭露头角，已经成为当前的研究热点和重要方向。本文采用时域有限差分算法（Finite-difference time-domain,FDTD）设计并优化了基于InGaAs雪崩探测器原位集成的超透镜，同时估算了超透镜的聚焦效率和透射率。仿真结果表明，超透镜将入射光会聚至探测器的光敏区中，透射率达到82.8%，并且在目标焦距150μm、超透镜半径50μm时聚焦效率达到84.89%。为进一步提高透射率，在超透镜表面增加抗反射层（AR Layer）。结果表明，300nm的SiO_2层透射率达到最大值86.6%,250 nm的SiN层透射率达到最大值87.6%，透射率比未增加AR层时分别增加了3.8%和4.8%。最后计算得出集成超透镜的探测器吸收区光场能量比未集成超透镜的探测器吸收区光场能量提升了250.96倍，将极大提升探测器的响应度。本文提出了单片集成超透镜的雪崩探测器设计方案，将雪崩探测器光敏区之外的入射光会聚至光敏区，在不损失带宽前提下提升探测器的量子效率，为高响应度、带宽雪崩探测器的设计提供了新思路。
Keyword ：
探测器 探测器 聚焦效率 聚焦效率 超透镜 超透镜 量子效率 量子效率
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 初光辉 , 杨国皓 , 刘天宏 et al. 用于雪崩光电探测器响应度增强的超透镜设计与仿真 [J]. | 发光学报 , 2023 , 44 (12) : 2250-2257 . |
| MLA | 初光辉 et al. "用于雪崩光电探测器响应度增强的超透镜设计与仿真" . | 发光学报 44 . 12 (2023) : 2250-2257 . |
| APA | 初光辉 , 杨国皓 , 刘天宏 , 李晋平 , 常卫杰 , 范鑫烨 et al. 用于雪崩光电探测器响应度增强的超透镜设计与仿真 . | 发光学报 , 2023 , 44 (12) , 2250-2257 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
In addition to the focusing and imaging functions，Metalens can also manipulate light field polarization，wavelength，and amplitude through kinds of meta-units. Due to the small size，light weight，low cost and easy inte⁃ gration，Metalens has become a research hotspot and important trend in optoelectronic integration area. In this pa⁃ per，finite-difference time-domain（FDTD）algorithm is used to design and optimize Metalens based on in⁃situ inte⁃ gration of InGaAs avalanche detectors，and the focusing efficiency and transmittance of the Metalens are calculated. The simulation results show that the Metalens converges incident light into the absorption layer of detector，the trans⁃ mittance reaches 82. 8%，and the focusing efficiency reaches 84. 89% when the target focal length is 150 μm and the Metalens radius is 50 μm. To further increase the transmittance，an anti-reflection（AR）layer is added. The results show that the maximum transmittance is 86. 6% and 87. 6% for 300 nm SiO2 and 250 nm SiN. Compared with the Metalens without AR layer，the max transmittance increased by 3. 8% and 4. 8%，respectively. Finally，it is estimat⁃ ed that the energy of the light field in the absorption region integrated with Metalens is 250. 96 times higher than that of the detector without Metalens，which can greatly improve the responsivity of detector. This paper proposes a mono⁃ lithic integrated method for avalanche detector with Metalens，which can concentrate the energy outside the detection area into absorption area，improves the quantum efficiency of detector without bandwidth reduction. This will provide a new sight for high responsivity and high bandwidth detectors. © 2023 Chines Academy of Sciences. All rights reserved.
Keyword ：
detector detector focusing efficiency focusing efficiency Metalens Metalens quantum efficiency quantum efficiency
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Chu, G. , Yang, G. , Liu, T. et al. Design and Simulation of Metalens for Enhanced Responsivity of Avalanche Photodetectors; [用 于 雪 崩 光 电 探 测 器 响 应 度 增 强 的 超 透 镜 设 计 与 仿 真] [J]. | Chinese Journal of Luminescence , 2023 , 44 (12) : 2250-2257 . |
| MLA | Chu, G. et al. "Design and Simulation of Metalens for Enhanced Responsivity of Avalanche Photodetectors; [用 于 雪 崩 光 电 探 测 器 响 应 度 增 强 的 超 透 镜 设 计 与 仿 真]" . | Chinese Journal of Luminescence 44 . 12 (2023) : 2250-2257 . |
| APA | Chu, G. , Yang, G. , Liu, T. , Li, J. , Chang, W. , Fan, X. et al. Design and Simulation of Metalens for Enhanced Responsivity of Avalanche Photodetectors; [用 于 雪 崩 光 电 探 测 器 响 应 度 增 强 的 超 透 镜 设 计 与 仿 真] . | Chinese Journal of Luminescence , 2023 , 44 (12) , 2250-2257 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Export
| Results： |
Selected to |
| Format： |
