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Broadband high-efficiency dielectric metalenses based on quasi-continuous nanostrips

Opto-electronic advances 2024年第5期7卷 43-51页

作者： Xiaohu Zhang Qinmiao Chen Dongliang Tang Kaifeng Liu Haimo Zhang Lintong Shi Mengyao He Yongcai Guo Shumin Xiao key laboratory of optoelectronic Technology and Systems of the Education Ministry of China Chongqing UniversityChongqing 400044China Ministry of Industry and Information Technology key lab of Micro-Nano Optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic SystemsHarbin Institute of TechnologyShenzhen 518055China key laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education&Hunan provincial key laboratory of Low-Dimensional Structural Physics and Devices School of Physics and ElectronicsHunan UniversityChangsha 410082China

Benefiting from the abrupt phase changes within subwavelength thicknesses,metasurfaces have been widely applied for lightweight and compact optical *** broadband and high-efficiency characteristics are highly attractive for the practical implementation of ***,current metasurface devices mostly adopt discrete micro/nano structures,which rarely realize both merits *** this paper,dielectric metasurfaces composed of quasi-continuous nanostrips are proposed to overcome this *** quasi-continuous nanostrips metasurface,a normal focusing metalens and a superoscillatory lens overcoming the diffraction limit are designed and experimentally *** quasi-continuous metadevices can operate in a broadband wavelength ranging from 450 nm to 1000nm and keep a high power *** average efficiency of the fabricated metalens reaches 54.24%,showing a significant improvement compared to the previously reported metalenses with the same *** proposed methodology can be easily extended to design other metadevices with the advantages of broadband and high-efficiency in practical optical systems.

关键词： broadband high-efficiency metalens sub-diffraction quasi-continuous

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Synergistically enhanced Si_(3)N_(4)/Cu heterostructure bonding by laser surface modification

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Journal of materials Science & Technology 2024年第15期182卷 187-197页

作者： Yanyu Song Haitao Zhu Duo Liu Xiaoguo Song Hong Bian Wei Fu Danyang Lin Caiwang Tan Jian Cao State key laboratory of advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China Shandong provincial key lab of Special Welding Technology Harbin Institute of Technology at WeihaiWeihai 264209China Shandong Institute of Shipbuilding Technology Harbin Institute of Technology at WeihaiWeihai 264209China

A bonding approach based on laser surface modification was developed to address the poor bonding be-tween Si_(3)N_(4) ceramic and *** bonding mechanism in Si_(3)N_(4)/Cu heterogeneous composite structure fabricated by laser modification-assisted bonding is examined by means of scanning/transmission elec-tron microscopy and thermodynamic *** the bonding process under laser modification,atomic intermixing at the interface is confirmed,as a result of the enhanced diffusion assisted by the dissocia-tion of Si_(3)N_(4) ceramic by *** dissociating Si precipitations on the surface,as well as the formation of micro-pores interfacial structure,would be the key concept of the bonding,by which the seamless and robust heterointerfaces were *** controlling the laser-modifying conditions,we can obtain a reli-able heterostructure via the optimization of the trade-off of the surface structure and bonding strength,as determined by the laser-modified surface prior to *** maximum structure depth and S ratio at the Si_(3)N_(4) surface were produced at a laser power of 56 W,corresponding to the maximal shear strength of 15.26 *** is believed that the further development of this bonding technology will advance power electronic substrate fabrication applied in high-power devices.

关键词： Silicon nitride Laser surface modification Interfacial microstructure Analytical modeling Mechanical properties

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Resonantly enhanced second-and third-harmonic generation in dielectric nonlinear metasurfaces

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Opto-electronic advances 2024年第5期7卷 5-19页

作者： Ji Tong Wang Pavel Tonkaev Kirill Koshelev Fangxing Lai Sergey Kruk Qinghai Song Yuri Kivshar Nicolae C.Panoiu Department of electronic and Electrical Engineering University College LondonLondon WC1E 7JEUnited Kingdom Nonlinear Physics Center Research School of PhysicsAustralian National UniversityCanberra ACT 2601Australia Ministry of Industry and Information Technology key lab of Micro-Nano Optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic SystemsHarbin Institute of TechnologyShenzhen 518055China Wuzhen laboratory EGO Wuzhen Digital Economy Industrial ParkNo.925 Daole RoadTongxiangChina

Nonlinear dielectric metasurfaces provide a promising approach to control and manipulate frequency conversion optical processes at the nanoscale,thus facilitating both advances in fundamental research and the development of new practical applications in photonics,lasing,and ***,we employ symmetry-broken metasurfaces made of centrosymmetric amorphous silicon for resonantly enhanced second-and third-order nonlinear optical *** the rich physics of optical quasi-bound states in the continuum and guided mode resonances,we comprehensively study through rigorous numerical calculations the relative contribution of surface and bulk effects to second-harmonic generation(SHG)and the bulk contribution to third-harmonic generation(THG) from the ***,we experimentally achieve optical resonances with high quality factors,which greatly boosts light-matter interaction,resulting in about 550 times SHG enhancement and nearly 5000-fold increase of THG.A good agreement between theoretical predictions and experimental measurements is *** gain deeper insights into the physics of the investigated nonlinear optical processes,we further numerically study the relation between nonlinear emission and the structural asymmetry of the metasurface and reveal that the generated harmonic signals arising from linear sharp resonances are highly dependent on the asymmetry of the *** work suggests a fruitful strategy to enhance the harmonic generation and effectively control different orders of harmonics in all-dielectric metasurfaces,enabling the development of efficient active photonic nanodevices.

关键词： second-harmonic generation third-harmonic generation bound state in the continuum guided mode resonance all-dielectric metasurfaces nonlinear optics

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Highly efficient nonuniform finite difference method for three-dimensional electrically stimulated liquid crystal photonic devices

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photonics Research 2024年第4期12卷 865-875页

作者： ZHENGHAO GUO MENGJUN LIU ZIJIA CHEN RUIZHI YANG PEIYUN LI HAIXIA DA DONG YUAN GUOFU ZHOU LINGLING SHUI HUAPENG YE Guangdong provincial key laboratory of Optical Information materials and Technology&Institute of electronic Paper Displays South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China SCNU-TUE Joint lab of Device Integrated Responsive materials(DIRM) National Center for International Research on Green OptoelectronicsSouth China Normal UniversityGuangzhou 510006China Guangdong provincial key laboratory of Nanophotonic Functional materials and Devices School of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006China Joint laboratory of Optofluidic Technology and Systems National Center for International Research on Green OptoelectronicsSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China College of electronic and Optical Engineering&College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210046China key laboratory of Radio Frequency and Micro-Nano electronics of jiangsu Province Nanjing 210023China

Liquid crystal(LC)photonic devices have attracted intensive attention in recent decades,due to the merits of tunability,cost-effectiveness,and high ***,the precise and efficient simulation of large-scale three-dimensional electrically stimulated LC photonic devices remains challenging and resource *** we report a straightforward nonuniform finite difference method(NFDM)for efficiently simulating largescale LC photonic devices by employing a spatially nonuniform mesh grid.

关键词： nonuniform crystal finite

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Semi-quantum private comparison protocol of size relation with d-dimensional GHZ states

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Chinese Physics B 2022年第1期31卷 130-135页

作者： Bing Wang San-Qiu Liu Li-Hua Gong Jiangxi Province key laboratory of Fusion and Information Control Department of PhysicsNanchang UniversityNanchang 330031China School of materials Science and Engineering Nanchang UniversityNanchang 330031China NCU-ASIPP Magnetic Confinement Fusion Joint lab Institute of Fusion Energy and Plasma ApplicationNanchang UniversityNanchang 330031China Department of electronic Information Engineering Nanchang UniversityNanchang 330031China

A novel efficient semi-quantum private comparison protocol based on the d-dimensional GHZ states is *** the assistance of semi-honest third party,two classical participants can compare the size relation of their secrets without any information *** reduce the consumption of quantum devices,the qubit efficiency of our protocol is improved by introducing the semi-quantum conception via the existing semi-quantum private ***,it is unnecessary to prepare the secure classical authentication channel among participants in *** is shown that our protocol is not only correct and efficient,but also free from external and internal attacks.

关键词： semi-quantum private comparison size relation dimensional GHZ state qubit efficiency

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Miniature tunable Airy beam optical meta-device

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Opto-electronic advances 2024年第2期7卷 5-12页

作者： Jing Cheng Zhang Mu Ku Chen Yubin Fan Qinmiao Chen Shufan Chen Jin Yao Xiaoyuan Liu Shumin Xiao Din Ping Tsai Department of Electrical Engineering City University of Hong KongKowloonHong Kong SAR 999077China State key laboratory of Terahertz and Millimeter Waves City University of Hong KongKowloonHong Kong SAR 999077China Centre for Biosystems Neuroscienceand NanotechnologyCity University of Hong KongKowloonHong Kong SAR 999077China Ministry of Industry and Information Technology key lab of Micro-Nano Optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic SystemsHarbin Institute of TechnologyShenzhen 518055China

Tunable Airy beams with controllable propagation trajectories have sparked interest in various fields,such as optical manipulation and laser *** research approaches encounter challenges related to insufficient compactness and integration feasibility,or they require enhanced tunability to enable real-time dynamic manipulation of the propagation *** this work,we present a novel method that utilizes a dual metasurface system to surpass these limitations,significantly enhancing the practical potential of the Airy *** approach involves encoding a cubic phase profile and two off-axis Fresnel lens phase profiles across the two *** validity of the proposed strategy has been confirmed through simulation and experimental *** proposed meta-device addresses the existing limitations and lays the foundation for broadening the applicability of Airy beams across diverse domains,encompassing light-sheet microscopy,laser fabrication,optical tweezers,etc.

关键词： metasurface miniature device tunable Airy beam tunable meta-device

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Three-dimensional isotropic microfabrication in glass using spatiotemporal focusing of high-repetition-rate femtosecond laser pulses

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Opto-electronic advances 2023年第10期6卷 18-29页

作者： Yuanxin Tan Haotian Lv Jian Xu Aodong Zhang Yunpeng Song Jianping Yu Wei Chen Yuexin Wan Zhaoxiang Liu Zhaohui Liu Jia Qi Yangjian Cai Ya Cheng Shandong provincial Engineering and Technical Center of Light Manipulations&Shandong provincial key laboratory of Optics and photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan 250014China XXL-The Extreme Optoelectromechanics laboratory School of Physics and Electronics ScienceEast China Normal UniversityShanghai 200241China Joint Research Center of Light Manipulation Science and photonic Integrated Chip of East China Normal University and Shandong Normal University East China Normal UniversityShanghai 200241China Collaborative Innovation Center of Light Manipulation and Applications Shandong Normal UniversityJinan 250358China

To improve the processing efficiency and extend the tuning range of 3D isotropic fabrication,we apply the simultaneous spatiotemporal focusing(SSTF)technique to a high-repetition-rate femtosecond(fs)fiber laser *** the SSTF scheme,we propose a pulse compensation scheme for the fiber laser with a narrow spectral bandwidth by building an extra-cavity pulse *** further demonstrate truly 3D isotropic microfabrication in photosensitive glass with a tunable resolution ranging from 8μm to 22μm using the SSTF of fs laser ***,we systematically investigate the influences of pulse energy,writing speed,processing depth,and spherical aberration on the fabrication *** a proof-of-concept demonstration,the SSTF scheme was further employed for the fs laser-assisted etching of complicated glass microfluidic structures with 3D uniform *** developed technique can be extended to many applications such as advanced photonics,3D biomimetic printing,micro-electromechanical systems,and lab-on-a-chips.

关键词： simultaneous spatiotemporal focusing technique pulse compensation pulse stretcher 3D isotropic fabrication chemical etching

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Specialty optical fibers for advanced sensing applications

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Opto-electronic Science 2023年第2期2卷 1-26页

作者： Huanhuan Liu Dora Juan Juan Hu Qizhen Sun Lei Wei Kaiwei Li Changrui Liao Bozhe Li Cong Zhao Xinyong Dong Yuhan Tang Yihong Xiao Gerd Keiser Perry Ping Shum Guangdong key laboratory of Integrated Optoelectronics Intellisense Department of Electronic and Electrical EngineeringSouthern University of Science and TechnologyShenzhen 518055China Institute for Infocomm Research(I2R) Agency for ScienceTechnology and Research(A*STAR)1 Fusionopolis Way#21-01Connexis South TowerSingapore 138632Singapore School of Electrical and electronic Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore School of Optical and electronic Information National Engineering Laboratory for Next Generation Internet Access SystemWuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China key laboratory of Bionic Engineering of Ministry of Education Jilin UniversityChangchun 130022China key laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Shenzhen key laboratory of photonic Devices and Sensing Systems for Internet of Things Guangdong and Hong Kong Joint Research Centre for Optical Fibre SensorsShenzhen UniversityShenzhen 518060China Guangdong laboratory of Artificial Intelligence and Digital Economy(SZ) Shenzhen 518107China Guangdong provincial key laboratory of Information photonics Technology School of Information EngineeringGuangdong University of TechnologyGuangzhou 510006China Department of Electrical&Computer Engineering Boston UniversityBoston 02215USA Pengcheng laboratory Shenzhen 518055China

Optical fiber technology has changed the world by enabling extraordinary growth in world-wide communications and *** rapid development and wide deployment of optical fiber sensors are driven by their excellent sensing performance with outstanding flexibility,functionality,and ***,the research on specialty optical fibers is playing a critical role in enabling and proliferating the optical fiber sensing *** paper overviews recent developments in specialty optical fibers and their sensing *** specialty optical fibers are reviewed based on their innovations in special structures,special materials,and technologies to realize lab in/on a *** overview of sensing applications in various fields is *** prospects and emerging research areas of specialty optical fibers are also discussed.

关键词： specialty optical fibers photonic crystal fiber multifunctional multi-material fibers lab in/on fiber

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