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Editorial for special issue on advances in metasurfaces

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Chinese Optics Letters 2018年第5期16卷 1-1页

作者： Qiwen Zhan qiaoqiang gan Department of Electro-Optics and Photonics University of Dayton USA Electrical Engineering Department University at Buffalo SUNY USA

Metasurface refers to a type of artificial thin film materials with sub-wavelength features that can generate the desired and/or new optical phenomena. The past decade has witnessed significant advances in the metasurface, ranging from fundamental physics to nanomanufacturing methods and practical applications. Typical research efforts include wave- front engineering and detection [e.g., Yu, Science 334, 333 （2011）; Capasso, Nat. Commun. 3, 1278 （2012）], flat optics for focusing and imaging [e.g., Cappaso, Nano Lett. 12, 4932 （2012）; Yu, Nat. Mater. 13, 139 （2014）], polarization manipulation [e.g., Zhan, Opt. Lett. 40, 4711 （2015）; Sci. Rep. 6, 29626 （2016）1, metahologram [e.g., Genevet, Rep. Prog. Phys. 78, 24401 （2015）; Tsai, Nano Lett. 14, 225 （2014）], light trapping and localization [e.g., gan, Adv. Mater. 26, 2737 （2014）; Adv. Opt. Mater. 5, 1700223 （2017）], absorption engineering [gan, Adv. Opt. Mater. 5, 1700166 （2017）; Sci. Adv. 3, e1602783 （2017）], and colorimetric display. Being able to manipulate the optical properties of metasurfaces will create new regimes of optical physics and impact a broad range of photonic, energy, and biomedical technologies, including new commercial product research and development. Research and development efforts of these artificial thin film materials in promising areas continue to emerge. To capture the latest developments in this important emerging field of optics, it is our pleasure to introduce the Chinese Optics Letters Special Issue on Advances in Metasurface with contributions from scientists around the world who are active in this field.

关键词： Editorial for special issue on advances in metasurfaces

Super-Resolution Displacement Spectroscopic Sensing over a Surface“Rainbow”

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Engineering 2022年第10期17卷 75-81页

作者： Lyu Zhou Nan Zhang Chang Chieh Hsu Matthew Singer Xie Zeng Yizheng Li Haomin Song Josep Jornet Yun Wu qiaoqiang gan Department of Electrical Engineering The State University of New York at BuffaloBuffaloNY 14260USA Department of Biomedical Engineering The State University of New York at BuffaloBuffaloNY 14260USA Department of Electrical and Computer Engineering Northeastern UniversityBostonMA 02115USA Material Science Engineering Program King Abdullah University of Science and TechnologyThuwal 23955-6900Saudi Arabia

Subwavelength manipulation of light waves with high precision can enable new and exciting applications in spectroscopy,sensing,and medical *** these applications,miniaturized spectrometers are desirable to enable the on-chip analysis of spectral *** particular,for imaging-based spectroscopic sensing mechanisms,the key challenge is to determine the spatial-shift information accurately(i.e.,the spatial displacement introduced by wavelength shift or biological or chemical surface binding),which is similar to the challenge presented by super-resolution ***,we report a unique"rainbow"trapping metasurface for on-chip spectrometers and *** with super-resolution image processing,the low-setting 4×optical microscope system resolves a displacement of the resonant position within 35 nm on the plasmonic rainbow trapping metasurface with a tiny area as small as0.002 *** unique feature of the spatial manipulation of efficiently coupled rainbow plasmonic resonances reveals a new platform for miniaturized on-chip spectroscopic analysis with a spectral resolution of 0.032 nm in wavelength *** this low-setting 4×microscope imaging system,we demonstrate a biosensing resolution of 1.92×109exosomes per milliliter for A549-derived exosomes and distinguish between patient samples and healthy controls using exosomal epidermal growth factor receptor(EGFR)expression values,thereby demonstrating a new on-chip sensing system for personalized accurate bio/chemical sensing applications.

关键词： Rainbow trapping Metasurface Surface plasmon polaritons Super-resolution displacement On-chip biosensing

Directly and instantly seeing through random diffusers by self-imaging in scattering speckles

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PhotoniX 2023年第1期4卷 674-687页

作者： Jietao Liu Wenhong Yang Guofeng Song qiaoqiang gan Laboratory of Photonic Integrated Circuits Xiong’an Institute of InnovationChinese Academy of SciencesXiong’an New AreaBeijing 071700Hebei ProvinceChina 2 Sustainability&Photonics Energy Research LaboratoryMaterial Science Engineering programDivision of Physical Science&EngineeringKing Abdullah University of Science and TechnologyThuwalSaudi Arabia

Imaging through scattering medium is challenging but important for different *** advances rely on computational image reconstruction from scattering *** these conventional investigations,speckles were always treated as scrambled grainy *** seeing through scattering diffusers has never been ***,we report a new strategy to see through random diffusers directly using self-imaging of *** analyzing the physics,a direct observation strategy through scattering media is reported with improved image *** this method,we experimentally demonstrated reconstruction-free real-time imaging of static and moving objects with their actual orientation information under single-wavelength and white light *** also proposed a modified speckle autocorrelation imaging(SAI)method inspired by the self-imaging ***,our strategy requires no pre-calibration or acquisition of point-spread-function,no active control of wavefronts or complicated equipment,nor iterations or carefully adjusted parameters,paving the way towards rapid and high-quality imaging through scattering diffusers.

关键词： speckle random instant

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纳米孔径垂直腔面发射激光器的制备及特性

Journal of Semiconductors 2007年第2期28卷 265-268页

作者：高建霞宋国峰甘巧强徐云郭宝山陈良惠中国科学院半导体研究所纳米光电子实验室北京100083

在850nm波长垂直腔面发射激光器的基础上制备了纳米孔径垂直腔面发射激光器.当小孔尺寸为400nm×400nm时,在25mA驱动电流下,其最大输出光功率达到了0.3mW,功率密度约为2mW/μm2.文中介绍了纳米孔径垂直腔面发射激光器的制备工艺,并对它... 详细信息

在850nm波长垂直腔面发射激光器的基础上制备了纳米孔径垂直腔面发射激光器.当小孔尺寸为400nm×400nm时,在25mA驱动电流下,其最大输出光功率达到了0.3mW,功率密度约为2mW/μm2.文中介绍了纳米孔径垂直腔面发射激光器的制备工艺,并对它的光谱特性和寿命特性进行了分析.

关键词：近场光学纳米孔径垂直腔面发射激光器输出光功率光学特性

Recent Strategies and Advances in Hydrogel‑Based Delivery Platforms for Bone Regeneration

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Nano-Micro Letters 2025年第3期17卷 389-439页

作者： Xiao Wang Jia Zeng Donglin gan Kun Ling Mingfang He Jianshu Li Yongping Lu Scientific and Technological Innovation Center for Biomedical Materials and Clinical Research Guangyuan Key Laboratory of Multifunctional Medical HydrogelGuangyuan Central HospitalGuangyuan 628000People’s Republic of China Jiangsu Collaborative Innovation Center of Biomedical Functional Materials Jiangsu Key Laboratory of Bio‑Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023People’s Republic of China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065People’s Republic of China

Bioactive molecules have shown great promise for effectively regulating various bone formation processes,rendering them attractive therapeutics for bone ***,the widespread application of bioactive molecules is limited by their low accumulation and short half-lives in *** have emerged as ideal carriers to address these challenges,offering the potential to prolong retention times at lesion sites,extend half-lives in vivo and mitigate side effects,avoid burst release,and promote adsorption under physiological *** review systematically summarizes the recent advances in the development of bioactive molecule-loaded hydrogels for bone regeneration,encompassing applications in cranial defect repair,femoral defect repair,periodontal bone regeneration,and bone regeneration with underlying ***,this review discusses the current strategies aimed at improving the release profiles of bioactive molecules through stimuli-responsive delivery,carrier-assisted delivery,and sequential ***,this review elucidates the existing challenges and future directions of hydrogel encapsulated bioactive molecules in the field of bone regeneration.

关键词： Hydrogel Bone regeneration Bioactive molecules Drug delivery Nano-/microscale carriers

大功率GaInP/AlGaInP半导体激光器

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Journal of Semiconductors 2005年第11期26卷 2213-2217页

作者：徐云郭良曹青宋国峰甘巧强杨国华李玉璋陈良惠中国科学院半导体研究所北京100083

制备了大功率实折射率GaInP/AlGaInP压应变分别限制量子阱激光器.所用外延材料在15°偏角的GaAs衬底上由有机金属气相外延一次外延生长得到.制备的激光器具有双沟脊波导结构,条宽和腔长分别为3和900μm,前后端面分别蒸镀5%的增透膜和95... 详细信息

制备了大功率实折射率GaInP/AlGaInP压应变分别限制量子阱激光器.所用外延材料在15°偏角的GaAs衬底上由有机金属气相外延一次外延生长得到.制备的激光器具有双沟脊波导结构,条宽和腔长分别为3和900μm,前后端面分别蒸镀5%的增透膜和95%的高反膜.分析了室温连续激射时激光器的光电输出性能.阈值电流的典型值为32mA,光学灾变阈值为88mW,功率为80mW时的工作电流为110mA,斜率效率为1W/A,串联电阻为3Ω.基横模光输出功率可达60mW,60mW时的平行结和垂直结的远场发散角分别为10°和32°,激射波长为658·4nm.器件的内损耗为4·1cm-1,内量子效率达80%,透明电流密度为648A/cm2.

关键词：半导体激光器 AlGaInP可见光激光器应变量子阱

AlGaInP大功率半导体激光器的漏电分析

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Journal of Semiconductors 2006年第Z1期27卷 299-303页

作者：徐云李玉璋宋国峰甘巧强杨国华曹玉莲曹青郭良陈良惠中国科学院半导体研究所北京100083 惠州市中科光电有限公司惠州516023

对于GaInP/AlGaInP量子阱激光器,在大电流注入或高温工作时有源区中注入的电子会越过势垒进入p型限制层成为漏电流,严重影响器件的正常工作.本文通过测试AlGaInP大功率压应变量子阱激光器的阈值电流和外微分量子效率随温度的变化,拟合... 详细信息

对于GaInP/AlGaInP量子阱激光器,在大电流注入或高温工作时有源区中注入的电子会越过势垒进入p型限制层成为漏电流,严重影响器件的正常工作.本文通过测试AlGaInP大功率压应变量子阱激光器的阈值电流和外微分量子效率随温度的变化,拟合出有源区电子的有效势垒高度,并与理论模拟结果进行了比较,讨论了p型限制层掺杂浓度的分布对势垒高度的影响.

关键词：半导体激光器 AlGaInP可见光激光器应变量子阱

Lightweight Al-Nb-Ti-V-Cr high entropy alloys with high hardness and enhanced mechanical properties via doping Co

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China Foundry 2025年

作者： Fang-dong Xu De-zhi Chen Rui-run Chen Bin gan Jing-yue Yu National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Suzhou Laboratory

To develop high-hardness and high-strength lightweight high entropy alloys （LHEAs）,a series of CoxAlNbTiVCr alloys were *** phase constitution,distribution,and crystal structure of the Laves phase in alloys can be altered by adjusting the composition of HEAs,which in turn influences their mechanical *** Nb Ti VCr （x=0,0.5,1,1.5,and 2,atomic ratio percentage） LHEAs were designed and prepared to characterize the microstructure and tailor the mechanical *** introduction of Co changes the microstructure of LHEAs from a single B2 structure to a mixture dendrite structure,which consists of B2 phase,C14 and C15 Laves *** the C14 and C15 Laves phases exhibit coupled *** parameters including mixing enthalpy (ΔHmix),valence electron concentration （VEC）,atomic radius size （δ）,mixing entropy （ΔS）,and electronegativity difference （Δχ） are used to predict the formation of B2 and Laves phase in *** the Co content increases from 0 to 1.5at.%,Laves phase volume fraction gradually increases,which leads to an enhancement in the compressive strength from 1,520.8 MPa to 1,844.4 ***1.5Al Nb Ti VCr alloy exhibits the maximum Vickers hardness of 699.4 *** improvement of mechanical properties mainly originates from solid solution strengthening and second phase strengthening.

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模块化的保偏近场扫描光学显微镜结构设计

现代科学仪器 2007年第3期 54-56页

作者：柯燕甘巧强杨建军周京丽王克逸张其锦中国科学技术大学精密机械与精密仪器系 2. 中科院半导体研究所纳米光电子实验室中国科学技术大学高分子科学与工程系

采用模块化的设计思想,制成了高质量且简单易用的音叉光纤探针模块、模块化的扫描探头、扫描台等,从而研制出高性能,易操作的模块化的保偏近场扫描光学显微镜。

关键词：近场扫描光学显微镜近场光学音叉光纤探针模块