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学者姓名：曾志平
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Abstract ：
The upconversion luminescence at the visible band was excited by the high power density whispering gallery mode (WGM) on the surface of the microsphere. Under the WGM excitation, Er3+ of NaYF4:Er3+ directly absorbed three photons at 1525 nm, followed by the generation of upconversion luminescence. We used WS2 quantum dots (QDs) as donors and NaYF4:Er3+ upconversion nanoparticles (UCNPs) as acceptors to enhance upconversion luminescence by Förster resonant energy transfer (FRET). The physical mixture composed of monolayer WS2 and NaYF4:Er3+ nanoparticles was coated on SiO2 microsphere by immersion method. Excited by high power density WGM, three photons were absorbed by WS2-QDs based on the quantum size effect to generate excited electrons as donors and UCNPs as acceptors based on FRET, subsequently, the energy of the electrons were transferred to the luminescence center Er3+ to improve the upconversion luminescence efficiency. The mechanism model of upconversion luminescence enhancement based on FRET of WS2–NaYF4:Er3+ was proposed, and the enhancement effect was experimentally studied and demonstrated. To study the distance dependence of energy transfer between QD and UCNP pairs, we covered the surface of the silica microsphere with a controlled concentration of WS2 mixed with NaYF4:Er3+ nano-particles. When the mixed concentration of WS2-QDs was 0.15%, the upconversion luminescence reached the highest efficiency. The results showed that a twofold upconversion luminescence enhancement can be experimentally achieved. The proposed approach for enhancing the upconversion luminescence could benefit the improvement of imaging signal-to-noise ratio (SNR) using UCNPs for fluorescent labels in life sciences. © 2024 Elsevier B.V.
Keyword ：
Energy transfer Energy transfer Erbium compounds Erbium compounds Forster resonance energy transfer Forster resonance energy transfer Microspheres Microspheres Nanocrystals Nanocrystals Optical resonators Optical resonators Photons Photons Semiconductor quantum dots Semiconductor quantum dots Signal to noise ratio Signal to noise ratio Silica Silica SiO2 nanoparticles SiO2 nanoparticles Sodium compounds Sodium compounds Tungsten compounds Tungsten compounds Two photon processes Two photon processes Whispering gallery modes Whispering gallery modes
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| GB/T 7714 | Huang, Yantang , He, Xinyu , Liao, Songsong et al. Enhanced upconversion luminescence of NaYF4:Er nanocrystals based on the synergy between whispering gallery mode excitation and förster resonant energy transfer [J]. | Optical Materials , 2024 , 150 . |
| MLA | Huang, Yantang et al. "Enhanced upconversion luminescence of NaYF4:Er nanocrystals based on the synergy between whispering gallery mode excitation and förster resonant energy transfer" . | Optical Materials 150 (2024) . |
| APA | Huang, Yantang , He, Xinyu , Liao, Songsong , Tu, Bifeng , Xu, Canhua , Huang, Wenqi et al. Enhanced upconversion luminescence of NaYF4:Er nanocrystals based on the synergy between whispering gallery mode excitation and förster resonant energy transfer . | Optical Materials , 2024 , 150 . |
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该文介绍了采用α–BBO双折射晶体透镜进行分光和光程差补偿方法，以及使用偏振相机进行单次采集的自干涉全息成像方法。该方法不需要使用额外器件补偿共轴干涉光路的光程差，适用于非相干白光照明情况下日常物体的全息图采集与图像重建。该文推导了再现距离与放大率等重要参数，并在此基础上，搭建了单发成像系统，还进行了实验验证。实验通过单次曝光采集了LED灯组的四幅不同偏振态全息图，并用四步相移法得到复振幅全息图，最后通过图像重建算法反演计算获得准确的再现图像。实验验证了基于α–BBO双折射晶体透镜的单次曝光自干涉全息成像方法的三维成像能力。
Keyword ：
光程差补偿 光程差补偿 单发成像 单发成像 双折射晶体透镜 双折射晶体透镜 自干涉全息 自干涉全息
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| GB/T 7714 | 许灿华 , 薛孔松 , 王雅婷 et al. 基于双折射晶体透镜的自干涉全息成像系统 [J]. | 实验技术与管理 , 2024 , 41 (08) : 88-95 . |
| MLA | 许灿华 et al. "基于双折射晶体透镜的自干涉全息成像系统" . | 实验技术与管理 41 . 08 (2024) : 88-95 . |
| APA | 许灿华 , 薛孔松 , 王雅婷 , 毛梦瑶 , 周田 , 曾志平 . 基于双折射晶体透镜的自干涉全息成像系统 . | 实验技术与管理 , 2024 , 41 (08) , 88-95 . |
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Fluorescence fluctuation-based super-resolution microscopy (FF-SRM) is an economical and widely applicable technique that significantly enhances the spatial resolution of fluorescence imaging by capitalizing on fluorescence intermittency. However, each variant of FF-SRM imaging has inherent limitations. This study proposes a super-resolution reconstruction strategy (synSRM) by synergizing multiple variants of the FF-SRM approach to address the limitations and achieve high-quality and high-resolution imaging. The simulation and experimental results demonstrate that, compared to images reconstructed using single FF-SRM algorithms, by selecting suitable synSRM routes according to various imaging conditions, further improvements of the spatial resolution and image reconstruction quality can be obtained for super-resolution fluorescence imaging. © 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Keyword ：
Fluorescence imaging Fluorescence imaging Fluorescence microscopy Fluorescence microscopy Image resolution Image resolution
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| GB/T 7714 | Zeng, Zhiping , Xu, Biqing , Qiu, Jin et al. Fluorescence super-resolution microscopy via fluctuation-based multi-route synergy [J]. | Biomedical Optics Express , 2024 , 15 (10) : 5886-5900 . |
| MLA | Zeng, Zhiping et al. "Fluorescence super-resolution microscopy via fluctuation-based multi-route synergy" . | Biomedical Optics Express 15 . 10 (2024) : 5886-5900 . |
| APA | Zeng, Zhiping , Xu, Biqing , Qiu, Jin , Chen, Xinyi , Huang, Yantang , Xu, Canhua . Fluorescence super-resolution microscopy via fluctuation-based multi-route synergy . | Biomedical Optics Express , 2024 , 15 (10) , 5886-5900 . |
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Automatic optical inspection technology (AOI) is a visual inspection technology that has developed rapidly in recent years. The high speed and accuracy of AOI can greatly enhance the efficiency of modern industrial production. However, when this technology is applied to optical components inspection, it encounters a challenge that the specular highlight induces over or under exposure during the imaging process, and further results in a low imaging contrast and unclear defect details of the targets. To solve this problem, a dark-field polarization imaging setup based on a division-of-focal-plane polarization camera was adopted to achieve high contrast defect images. Meanwhile, algorithms based on the improved LeNet-5 convolutional neural network were developed to recognize the defects. An accuracy above 99.5% was obtained for the distinction of defective and non-defective samples, and an accuracy of 94.4% was reached for the various defect classification. Our work demonstrated an effective application of polarization imaging and machine learning in AOI of optical components manufacturing.
Keyword ：
convolutional neural network convolutional neural network defect detection defect detection LeNet-5 LeNet-5 polarization imaging polarization imaging
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| GB/T 7714 | Xu, Canhua , Zheng, Daifu , Huang, Yantang et al. Defect inspection of optical components based on dark-field polarization imaging and convolutional neural network recognition algorithms [J]. | OPTICAL ENGINEERING , 2023 , 62 (4) . |
| MLA | Xu, Canhua et al. "Defect inspection of optical components based on dark-field polarization imaging and convolutional neural network recognition algorithms" . | OPTICAL ENGINEERING 62 . 4 (2023) . |
| APA | Xu, Canhua , Zheng, Daifu , Huang, Yantang , Zeng, Zhiping . Defect inspection of optical components based on dark-field polarization imaging and convolutional neural network recognition algorithms . | OPTICAL ENGINEERING , 2023 , 62 (4) . |
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Pancharatnam Berry (PB) phase optical elements can manipulate local polarization state of light in the cross-sectional plane by addressing an additional PB phase relating to the orientation of the optical axis of the waveplate-like structure. However, chromatic aberration including spectrum-dependent retardation and diffraction efficiency limits their applications in the field of visible broadband imaging and display. In this article, the chromatic aberration of a liquid crystal (LC) PB phase lens was measured by a home-built RGB full -Stokes imaging polarimeter. The chirality conversion efficiency and depolarization at RGB wavelengths can be calculated from the measured Stokes vectors. Our experiments show that even the spectrum-dependent retar-dation exists, the measured PB phase lens has a uniform and high diffraction efficiency in the visible band. Affected by the local LC molecule, the input polarization of RGB light was rotated in varying degrees, but the focusing or defocusing manipulation to the right-or left-hand circular polarization, originated from the PB phase, results in fixed focal lengths for different colors. Our experiments show that the LC-based PB phase lens is suitable for the visible broadband applications.
Keyword ：
Chromatic aberration Chromatic aberration Full-Stokes' RGB imaging Full-Stokes' RGB imaging LCVR LCVR Pancharatnam Berry phase Pancharatnam Berry phase
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| GB/T 7714 | Xu, CanHua , Zhou, Tian , Zheng, DaiFu et al. Chromatic aberration measurement of liquid crystal Pancharatnam Berry phase lens by a RGB full-Stokes imaging polarimeter [J]. | OPTICS AND LASER TECHNOLOGY , 2023 , 166 . |
| MLA | Xu, CanHua et al. "Chromatic aberration measurement of liquid crystal Pancharatnam Berry phase lens by a RGB full-Stokes imaging polarimeter" . | OPTICS AND LASER TECHNOLOGY 166 (2023) . |
| APA | Xu, CanHua , Zhou, Tian , Zheng, DaiFu , Ma, Jing , Huang, YanTang , Zeng, ZhiPing . Chromatic aberration measurement of liquid crystal Pancharatnam Berry phase lens by a RGB full-Stokes imaging polarimeter . | OPTICS AND LASER TECHNOLOGY , 2023 , 166 . |
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针对现有的荧光涨落超分辨显微成像运行平台算法不统一的现状，使用App Designer设计了基于MATLAB的多算法荧光涨落超分辨集成平台。该集成平台具有仿真生成荧光信号、调用多种超分辨算法、表征重建图像的强度相对误差和结构相似性等功能。通过该平台生成一组微管蛋白仿真图像序列以及使用荧光免疫标记方法采集一组细胞微管蛋白图像序列，使用4种荧光涨落超分辨算法进行图像重构。结果表明：4种超分辨算法可以显著提高成像分辨率，但每种超分辨算法重建图像在分辨率、强度相对误差等方面各有优劣；同时使用均值偏移算法预处理的重建图像具有更高的信噪比。该集成平台调用多种算法，并对重建图像进行质量评价，能用于生物亚细胞荧光超分辨成像及医学成像等方面的应用研究。
Keyword ：
亚细胞结构 亚细胞结构 衍射极限 衍射极限 超分辨成像 超分辨成像
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| GB/T 7714 | 李文波 , 邱锦 , 许必晴 et al. 多算法荧光涨落超分辨显微集成平台 [J]. | 实验室研究与探索 , 2023 , 42 (08) : 10-14 . |
| MLA | 李文波 et al. "多算法荧光涨落超分辨显微集成平台" . | 实验室研究与探索 42 . 08 (2023) : 10-14 . |
| APA | 李文波 , 邱锦 , 许必晴 , 许灿华 , 黄衍堂 , 曾志平 . 多算法荧光涨落超分辨显微集成平台 . | 实验室研究与探索 , 2023 , 42 (08) , 10-14 . |
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In this paper, the laser generated by Yb3+/Er3+ co-doped silica microspheres excited and tuned by amplified spontaneous emission (ASE) light source was studied. The adoption of ASE light avoids the synchronous adjustment of the coupling condition of the microcavity during broadband tuning process, and facilitates the actual application of the microcavity-based tunable laser. The stable single-mode laser at approximate 1595 nm was generated in the Yb3+/Er3+ co-doped silica microsphere due to the polarization insensitivity of the ASE light source with a center wavelength of 1 mu m. For the all-optical modulation of laser mode, a thin layer of copper film was coated on the spherical crown of the microsphere by magnetron sputtering. Controllable heating of the microsphere and linear tuning of laser mode were realized through the absorption of ASE light by the copper film injecting from the stem of the microsphere. The tuning range reached 190 GHz.
Keyword ：
(140.0140) Lasers and laser optics (140.0140) Lasers and laser optics (140.3600) Lasers tunable (140.3600) Lasers tunable (140.3945) Microcavities (140.3945) Microcavities (190.4870) Photothermal effects (190.4870) Photothermal effects
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| GB/T 7714 | Huang, Yantang , Liao, Songsong , Tu, Bifeng et al. All-optical tuning of the frequency of Yb3+/Er3+ co-doped microsphere WGM laser pumped by 1 μm ASE light source [J]. | OPTICS AND LASER TECHNOLOGY , 2023 , 169 . |
| MLA | Huang, Yantang et al. "All-optical tuning of the frequency of Yb3+/Er3+ co-doped microsphere WGM laser pumped by 1 μm ASE light source" . | OPTICS AND LASER TECHNOLOGY 169 (2023) . |
| APA | Huang, Yantang , Liao, Songsong , Tu, Bifeng , Xu, Qiling , Zeng, Zhiping , Xu, Canhua . All-optical tuning of the frequency of Yb3+/Er3+ co-doped microsphere WGM laser pumped by 1 μm ASE light source . | OPTICS AND LASER TECHNOLOGY , 2023 , 169 . |
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An integrated platform for multi-algorithm fluorescence fluctuation super-resolution nanoscopy is developed. The platform integrates 4 super-resolution algorithms for image reconstructions. Subcellular details can be discerned at the resolution beyond the diffraction limit using this platform. © 2023 The Author (s).
Keyword ：
Diffraction Diffraction Fluorescence Fluorescence Image reconstruction Image reconstruction Optical resolving power Optical resolving power
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| GB/T 7714 | Li, Wenbo , Zeng, Zhiping . An Integrated Platform for Multi-Algorithm Fluorescence Fluctuation Super-Resolution Nanoscopy [C] . 2023 . |
| MLA | Li, Wenbo et al. "An Integrated Platform for Multi-Algorithm Fluorescence Fluctuation Super-Resolution Nanoscopy" . (2023) . |
| APA | Li, Wenbo , Zeng, Zhiping . An Integrated Platform for Multi-Algorithm Fluorescence Fluctuation Super-Resolution Nanoscopy . (2023) . |
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通过研究荧光型光纤温度传感和热辐射型光纤温度传感，该文设计了一种结合荧光寿命与热辐射测温的光纤温度传感器，适用温度为30～800℃。首先，改进了传统的荧光传感探针，采用石英玻璃棒代替光纤，可避免高温下光纤吸收和散射损耗导致的光传输效率下降。其次，利用耐高温的Y(P,V)O_4:Eu~(3+)荧光材料进行中、低温段（低于400℃）的荧光寿命测温，获得材料荧光寿命与温度的关系；在中、高温段（高于300℃），使用光功率计测得1 490 nm波长下光纤探针的热辐射功率与温度的关系，并拟合得到热辐射功率与温度的四阶表达式；然后，在两种测温方法都有效的温度重叠区（300～360℃），使用荧光寿命测温值标定热辐射的功率与温度关系式，确保高温段的测温精度；最后，将荧光寿命测温与热辐射测温相结合，实现30～800℃范围内的温度测量。
Keyword ：
光纤温度传感器 光纤温度传感器 热辐射测温 热辐射测温 荧光传感探针 荧光传感探针 荧光寿命测温 荧光寿命测温
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| GB/T 7714 | 许灿华 , 周田 , 王雅婷 et al. 基于荧光寿命与热辐射测温的30℃至800℃的光纤温度传感器 [J]. | 实验技术与管理 , 2023 , 40 (11) : 28-34 . |
| MLA | 许灿华 et al. "基于荧光寿命与热辐射测温的30℃至800℃的光纤温度传感器" . | 实验技术与管理 40 . 11 (2023) : 28-34 . |
| APA | 许灿华 , 周田 , 王雅婷 , 薛孔松 , 曾志平 , 黄衍堂 . 基于荧光寿命与热辐射测温的30℃至800℃的光纤温度传感器 . | 实验技术与管理 , 2023 , 40 (11) , 28-34 . |
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为提高光学元件缺陷检测的效率和准确率,提出了一种基于偏振成像与卷积神经网络算法相结合的光学元件缺陷检测方法.通过分焦平面偏振相机与暗场成像方法相结合,降低高光现象对成像质量的影响,实现了结构紧凑、实时测量、成像质量高的光学元件成像光路;同时引入LeNet-5 卷积神经网络进行光学元件缺陷识别,通过采用线性修正单元、多尺度卷积和卷积通道拓展等优化方法,减小网络过拟合、提高网络缺陷识别能力.经试验对比,改进型LeNet-5 识别算法不需要对偏振图像进行预处理,对光学元件缺陷的识别准确率可达96.7％,并且运行速度和内存占用相比SqueezeNet网络模型存在明显优势.
Keyword ：
偏振成像 偏振成像 光学元件 光学元件 卷积神经网络 卷积神经网络 缺陷检测 缺陷检测
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| GB/T 7714 | 郑代福 , 周田 , 曾志平 et al. 适用于智能工业监测的光学元件缺陷识别技术 [J]. | 实验室研究与探索 , 2022 , 41 (11) : 13-17,22 . |
| MLA | 郑代福 et al. "适用于智能工业监测的光学元件缺陷识别技术" . | 实验室研究与探索 41 . 11 (2022) : 13-17,22 . |
| APA | 郑代福 , 周田 , 曾志平 , 黄衍堂 , 许灿华 . 适用于智能工业监测的光学元件缺陷识别技术 . | 实验室研究与探索 , 2022 , 41 (11) , 13-17,22 . |
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