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| 1 | Off-axis multi-wavelength dispersion controllingmetalens for multi-color imaging显示文摘Dispersion control is crucial in optical systems,and chromatic aberration is an important factor affecting imaging quality in imaging systems.Due to the inherent property of materials,dispersion engineering is complex and needs to trade off other aberration in traditional ways.Although metasurface offers an effective method to overcome these limits and results in well-engineered dispersion,off-axis dispersion control is still a challenging topic.In this paper,we design a single-layer metalens which is capable of focusing at three wavelengths(473 nm,532 nm,and 632 nm)with different incident angles(0°,-17°and 17°)into the same point.We also demonstrate that this metalens can provide an alternative for the bulky color synthetic prism in a 3-chips digital micromirror device(DMD)laser projection system.Through this approach,various off-axis dispersion controlling optical devices could be realized. | Kaihua Dou Xin Xie Mingbo Pu Xiong Li Xiaoliang Ma Changtao Wang Xiangang Luo | 2020 | Opto-Electronic Advances2020，3，4： | 7 |
| 2 | Crosstalk-free achromatic full Stokes imaging polarimetry metasurface enabled by polarization-dependent phase optimization显示文摘Imaging polarimetry is one of the most widely used analytical technologies for object detection and analysis.To date,most metasurface-based polarimetry techniques are severely limited by narrow operating bandwidths and inevitable crosstalk,leading to detrimental effects on imaging quality and measurement accuracy.Here,we propose a crosstalkfree broadband achromatic full Stokes imaging polarimeter consisting of polarization-sensitive dielectric metalenses,implemented by the principle of polarization-dependent phase optimization.Compared with the single-polarization optimization method,the average crosstalk has been reduced over three times under incident light with arbitrary polarization ranging from 9μm to 12μm,which guarantees the measurement of the polarization state more precisely.The experimental results indicate that the designed polarization-sensitive metalenses can effectively eliminate the chromatic aberration with polarization selectivity and negligible crosstalk.The measured average relative errors are 7.08%,8.62%,7.15%,and 7.59%at 9.3,9.6,10.3,and 10.6μm,respectively.Simultaneously,the broadband full polarization imaging capability of the device is also verified.This work is expected to have potential applications in wavefront detection,remote sensing,light-field imaging,and so forth. | Yaxin Zhang Mingbo Pu Jinjin Jin Xinjian Lu Yinghui Guo Jixiang Cai Fei Zhang Yingli Ha Qiong He Mingfeng Xu Xiong Li Xiaoliang Ma Xiangang Luo | 2022 | Opto-Electronic Advances2022，5，11： | 6 |
| 3 | All‐metallic wide‐angle metasurfaces for multifunctional polarization manipulation显示文摘Optical camouflage is a magical capability of animals as first noticed in 1794 by Erasmus Darwin in Zoonomia,but current biomimetic camouflage strategies cannot be readily applied in complex environments involving multispectral and in particular multi-polarization detection.Here we develop a plasmonic approach toward broadband infrared polarimetric crypsis,where the polarized thermal emission near the pseudo-Brewster angle is the main signal source and no existing polarizing camouflage technique has been discovered in nature.Based on all-metallic subwavelength structures,an electrodynamic resistance-reduction mechanism is proposed to avoid the significant polarization-dependent infrared absorption/radiation.It is also found that the structured metal surface presents giant extrinsic anisotropy regarding the phase shift between orthogonal polarization states,which helps to realize ultrahigh-efficiency and tunable polarization conversion in an unprecedented manner.Finally,we note that the catenary optical theory may provide a useful means to explain and predict these unusual performances. | Xiaoliang Ma Mingbo Pu Xiong Li Yinghui Guo Xiangang Luo | 2019 | Opto-Electronic Advances2019，2，3： | 6 |
| 4 | Tailoring active color rendering and multiband photodetection in a vanadium-dioxide-based metamaterial absorber显示文摘Metamaterials have demonstrated exotic electromagnetic properties, which offer a good platform for realizing light absorption, photodetection, filtering, and so on. However, broadband multifunctional metamaterial absorbers are restricted in cascaded structures. Here, broadband multifunctional properties were realized by introducing vanadium dioxide into a metamaterial absorber. Through the modified design and highly efficient utilization of multiple resonant modes, both plasmonic tunable color filters and near-infrared photodetectors can be simultaneously achieved by this construction. Meanwhile, active color and a photodetection band in the near-infrared range can become tunable with the insulating–metallic transition of vanadium dioxide. Thus, the variations of rendering colors could correspondingly indicate shifts of the near-infrared photodetection bands. This method theoretically confirms the feasibility of designing multifunctional devices via a vanadium-dioxide-based metamaterial absorber, which holds great promise for future versatile utilization of multiple physical mechanisms to achieve numerous functionalities in a simple nanostructure or device. | SHICHAO SONG XIAOLIANG MA MINGBO PU XIONG LI YINGHUI GUO PING GAO XIANGANG LUO | 2018 | Photonics Research2018，6，6： | 4 |
| 5 | Perfect electromagnetic and sound absorption via subwavelength holes array显示文摘 | Yanqin Wang Xiaoliang Ma Xiong Li Mingbo Pu Xiangang Luo | 2018 | Opto-Electronic Advances2018，1，8： | 3 |
| 6 | Dual-band and ultra-broadband photonic spin-orbit interaction for electromagnetic shaping based on single-layer silicon metasurfaces显示文摘Achieving electromagnetic wave scattering manipulation in the multispectral and broad operation band has been a long pursuit in stealth applications. Here, we present an approach by using single-layer metasurfaces composed of space-variant amorphous silicon ridges tiled on a metallic mirror, to generate high-efficiency dual-band and ultra-wideband photonic spin-orbit interaction and geometric phase. Two scattering engineered metasurfaces have been designed to reduce specular reflection;the first one can suppress both specular reflectances at 1.05–1.08 μm and 5–12 μm below 10%. The second one is designed for an ultra-broadband of 4.6–14 μm, which is actually implemented by cleverly connecting two bands of 4.6–6.1 μm and 6.1–14 μm. Furthermore, the presented structures exhibit low thermal emission at the same time due to the low absorption loss of silicon in the infrared spectrum, which can be regarded as an achievement of laser–infrared compatible camouflage.We believe the proposed strategy may open a new route to implement multispectral electromagnetic modulation and multiphysical engineering applications. | XIN XIE MINGBO PU XIONG LI KAIPENG LIU JINJIN JIN XIAOLIANG MA XIANGANG LUO | 2019 | Photonics Research2019，7，5： | 2 |
| 7 | Snapshot multi-dimensional computational imaging through a liquid crystal diffuser显示文摘Multi-dimensional optical imaging systems that simultaneously gather intensity,depth,polarimetric,and spectral information have numerous applications in medical sciences,robotics,and surveillance.Nevertheless,most current approaches require mechanical moving parts or multiple modulation processes and thus suffer from long acquisition time,high system complexity,or low sampling resolution.Here,a methodology to build snapshot multi-dimensional lensless imaging is proposed by combining planar-optics and computational technology,benefiting from sufficient flexibilities in optical engineering and robust information reconstructions.Specifically,a liquid crystal diffuser based on geometric phase modulation is designed to simultaneously encode the spatial,spectral,and polarization information of an object into a snapshot detected speckle pattern.At the same time,a post-processing algorithm acts as a special decoder to recover the hidden information in the speckle with the independent and unique point spread function related to the position,wavelength,and chirality.With the merits of snapshot acquisition,multi-dimensional perception ability,simple optical configuration,and compact device size,our approach can find broad potential applications in object recognition and classification. | YUNSONG LEI QI ZHANG YINGHUI GUO MINGBO PU FANG ZOU XIONG LI XIAOLIANG MA XIANGANG LUO | 2023 | Photonics Research2023，11，3： | 2 |
| 8 | Classical and generalized geometric phase in electromagnetic metasurfaces显示文摘The geometric phase concept has profound implications in many branches of physics,from condensed matter physics to quantum systems.Although geometric phase has a long research history,novel theories,devices,and applications are constantly emerging with developments going down to the subwavelength scale.Specifically,as one of the main approaches to implement gradient phase modulation along a thin interface,geometric phase metasurfaces composed of spatially rotated subwavelength artificial structures have been utilized to construct various thin and planar meta-devices.In this paper,we first give a simple overview of the development of geometric phase in optics.Then,we focus on recent advances in continuously shaped geometric phase metasurfaces,geometric–dynamic composite phase metasurfaces,and nonlinear and high-order linear Pancharatnam–Berry phase metasurfaces.Finally,conclusions and outlooks for future developments are presented. | Yinghui Guo Mingbo Pu Fei Zhang Mingfeng Xu Xiong Li Xiaoliang Ma Xiangang Luo | 2022 | Photonics Insights2022，1，1： | 2 |
| 9 | Synthetic vector optical fields with spatial and temporal tunability显示文摘As an intrinsic nature of light,polarization plays a critical role in the vectorial characteristic of optical fields.Vector optical fields with an inhomogeneous polarization distribution show many exotic phenomena and applications not existing in scalar optical fields.Existing polarization optics,however,mainly focuses on the manipulation of polarization distribution on a single transverse plane.Here,we propose a synthetic approach to realize polarization manipulation with spatial and temporal degrees.The underlying mechanism relies on decoupling two orthogonal polarization states through asymmetric photonic spin-orbit interactions to obtain customer-tailored phase and amplitude difference in both transverse and longitudinal space,thereby changing the resulting polarization distribution at will in three-dimensional(3 D)space.Remarkably,a longitudinally varied cylindrical vector field is experimentally demonstrated by a monolayer metasurface,in which the polarization distribution switches continuously and periodically between radial and azimuthal polarization.Furthermore,the vector field can be dynamically tuned by rotating the incident polarization state.Our work extends polarization optics from two-dimensional space to 3 D space,allowing the arbitrary generation and manipulation of 3D vector optical fields with temporal tunability. | Fei Zhang MingBo Pu YingHui Guo XiaoLiang Ma Xiong Li Ping Gao XianGang Luo | 2022 | Science China(Physics,Mechanics & Astronomy)2022，65，5： | 2 |
| 10 | Broadband high-efficiency polymerized liquid crystal metasurfaces with spin-multiplexed functionalities in the visible显示文摘Traditional optical components are usually designed for a single functionality and narrow operation band,leading to the limited practical applications.To date,it is still quite challenging to efficiently achieve multifunctional performances within broadband operating bandwidth via a single planar optical element.Here,a broadband high-efficiency polarization-multiplexing method based on a geometric phase polymerized liquid crystal metasurface is proposed to yield the polarization-switchable functionalities in the visible.As proofs of the concept,two broadband high-efficiency polymerized liquid crystal metalenses are designed to obtain the spin-controlled behavior from diffraction-limited focusing to sub-diffraction focusing or focusing vortex beams.The experimental results within a broadband range indicate the stable and excellent optical performance of the planar liquid crystal metalenses.In addition,low-cost polymerized liquid crystal metasurfaces possess unique superiority in large-scale patterning due to the straightforward processing technique rather than the point-by-point nanopatterning method with high cost and low throughput.The high-efficiency liquid crystal metasurfaces also have unrivalled advantages benefiting from the characteristic with low waveguide absorption.The proposed strategy paves the way toward multifunctional and high-integrity optical systems,showing great potential in mobile devices,optical imaging,robotics,chiral materials,and optical interconnections. | XINJIAN LU XIAOYIN LI YINGHUI GUO MINGBO PU JIANGYU WANG YAXIN ZHANG XIONG LI XIAOLIANG MA XIANGANG LUO | 2022 | Photonics Research2022，10，6： | 2 |
| 11 | 1 kW/1 kWh advanced vanadium redox flow battery utilizing mixed acid electrolytes显示文摘 | Soowhan Kim Edwin Thomsen Guanguang Xia Zimin Nie Jie Bao Kurtis Recknagle Wei Wang Vilayanur Viswanathan Qingtao Luo Xiaoliang Wei Alasdair Crawford Greg Coffey Gary Maupin Vincent Sprenkle | 2013 | Journal of Power Sources2013，，： | 1 |
| 12 | High performance 1 mm AlGaN/GaN HEMT based on SiC substrate显示文摘This is our first report on the high performance 1 mm AlGaN/GaN high electron mobility transistor(HEMT)which was developed using home-made AlGaN/GaN epitaxy structures based on SiC substrate.Metal-organic chemical vapor deposition(MOCVD)was used to generate the epitaxy layers.Corresponding experiments show that the device has a gate length of 0.8 mm exhibiting drain current density of 1.16 A/mm,transconductance of 241 ms/mm,a gate-drain break-down voltage larger than 80 V,maximum current gain frequency of 20 GHz and maximum power gain frequency of 28 GHz.In addition,the power gain under the continues wave condition is 14.2 dB with a power density of 4.1 W/mm,while under the pulsed wave condition,power gain reaches 14.4 dB with power density at 5.2 W/mm.Furthermore,the two-port network impedance characteristics display great potential in microwave application. | Weijun LUO Xiaojuan CHEN Chengzhan LI Xinyu LIU Zhijing HE Ke WEI Xiaoxin LIANG Xiaoliang WANG | 2008 | Frontiers of Electrical and Electronic Engineering in China2008，3，1： | 1 |
| 13 | Growth and fabrication of AlGaN/GaN HEMT based on Si(1<ce:hsp sp='0.16'/>1<ce:hsp sp='0.16'/>1) substrates by MOCVD显示文摘 | Weijun Luo Xiaoliang Wang Hongling Xiao Cuimei Wang Junxue Ran Lunchun Guo Jianping Li Hongxin Liu Yanling Chen Fuhua Yang Jinmin Li | 2008 | Microelectronics Journal2008，，9： | 1 |
| 14 | Archaean Greenstone Belts in China显示文摘Chinese Achaean greenstone belts are mainly distributed along the northern and southwestern margins of the North China platform. In terms of their geological characteristics, the greenstone belts in China are comparable to those in other countries but at the same time have unique features of their own. In view of their geochemistry, the Chinese greenstone belts may be grouped into three types: the Jiapigou type, Qingyuan type and Xiaoqinling type. The greenstone belts were formed possibly in a rift-type palaeo-tectonic setting, similar to that of the modern island are-continental margin mobile belts. | Shen Baofeng, Peng Xiaoliang, Luo Hui and Mao DebaoTianjin Institute of Geology, Ministry of Geology and Mineral Resources, Tianjin | 1994 | Acta Geologica Sinica(English Edition)1994，68，1： | 1 |
| 15 | 超表面三维彩色全息显示文摘全息光学是近代光学领域的一个重要分支。全息技术充分利用完整的电磁场振幅和位相信息实现对电磁场的重构。近些年来发展起来的计算全息技术通过电磁算法来计算得到包含振幅和位相信息的全息图,在外界光源的照射下可以产生预先设计的、虚拟的物体图像。现有的基于二元光学元件或空间光调制器等实现的位相型计算全息图,通常存在像元尺寸大和位相调控能力有限等限制,使得全息的视场角受限,难以实现大视场三维彩色全息。 | Li, Xiong Chen, Lianwei Li, Yang Zhang, Xiaohu Pu, Mingbo Zhao, Zeyu Ma, Xiaoliang Wang, Yanqin Hong, Minghui Luo, Xiangang | 2017 | 光电工程2017，44，1： | 1 |
| 16 | Size and shape controllable preparation of graphene sponge by freezing, lyophilizing and reducing in container显示文摘Graphene sponge(GS) is a porous 3D structure of graphene. Although hydrothermal reduction, chemical vapor deposition, solution reduction and high temperature annealing could be used for the preparation of GS, the size and shape cannot be well controlled. Herein, we reported a facile method to prepare GS under mild condition in a size and shape controllable way. Graphene oxide was lyophilized to form the spongy structure and reduced by steamy hydrazine hydrate to produce GS. The size and shape of GS prepared were nearly identical to that of the container. The reduction degree of GS could be regulated by the reduction temperature and time. | ZHAO LianQin YU BaoWei ZHANO XiaoLiang WU RuiHan LIU XiaoYang LIAO Rong YANG ShengTao LUO JianBin | 2016 | Science China(Technological Sciences)2016，59，5： | 1 |
| 17 | Physics-data-driven intelligent optimization for large-aperture metalenses显示文摘Metalenses have gained significant attention and have been widely utilized in optical systems for focusing and imaging,owing to their lightweight,high-integration,and exceptional-flexibility capabilities.Traditional design methods neglect the coupling effect between adjacent meta-atoms,thus harming the practical performance of meta-devices.The existing physical/data-driven optimization algorithms can solve the above problems,but bring significant time costs or require a large number of data-sets.Here,we propose a physics-data-driven method employing an“intelligent optimizer”that enables us to adaptively modify the sizes of the meta-atom according to the sizes of its surrounding ones.The implementation of such a scheme effectively mitigates the undesired impact of local lattice coupling,and the proposed network model works well on thousands of data-sets with a validation loss of 3×10^(−3).Based on the“intelligent optimizer”,a 1-cm-diameter metalens is designed within 3 hours,and the experimental results show that the 1-mm-diameter metalens has a relative focusing efficiency of 93.4%(compared to the ideal focusing efficiency)and a Strehl ratio of 0.94.Compared to previous inverse design method,our method significantly boosts designing efficiency with five orders of magnitude reduction in time.More generally,it may set a new paradigm for devising large-aperture meta-devices. | Yingli Ha Yu Luo Mingbo Pu Fei Zhang Qiong He Jinjin Jin Mingfeng Xu Yinghui Guo Xiaogang Li Xiong Li Xiaoliang Ma Xiangang Luo | 2023 | Opto-Electronic Advances2023，6，11： | 1 |
| 18 | Advances of dispersion-engineered metamaterials显示文摘 | Yinghui Guo Mingbo Pu Xiaoliang Ma Xiong Li Xiangang Luo | 2017 | 光电工程2017，44，1： | 0 |
| 19 | Reactivity Meter for CENTER Project显示文摘A reactivity meter for the CENTER project was developed.The reactivity meter was tested on the reactor in the Nuclear Power Institute of China.The testing result was very satisfying,and the all parameters were accepted.The testing contents include self-testing of device,the accuracy of reactivity,measuring the reactivity value of control rod,the reliability of long-time running,etc. | LUO Huangda CHEN Xiaoliang ZHU Qingfu CHEN Xiaoxian LIANG Song ZHANG Zhifeng HU Xiao | 2018 | 中国原子能科学研究院年报2018，，1： | 0 |
| 20 | Gecko-Inspired Slant Hierarchical Microstructure-Based Ultrasensitive Iontronic Pressure Sensor for Intelligent Interaction显示文摘Highly sensitive flexible pressure sensors play an important role to ensure the safety and friendliness during the human-robot interaction process.Microengineering the active layer has been shown to improve performance of pressure sensors.However,the current structural strategy almost relying on axial compression deformation suffers structural stifening,and together with the limited area growth efficiency of conformal interface,essentially limiting the maximum sensitivity.Here,inspired by the interface contact behavior of gecko's feet,we design a slant hierarchical microstructure to act as an electrode contacting with an ionic gel layer,fundamentally eliminating the pressure resistance and maximizing functional interface expansion to achieving ultrasensitive sensitivity.Such a structuring strategy dramatically improves the relative capacitance change both in the low-and high-pressure region,thereby boosting the sensitivity up to 36000kPa^(-1) and effective measurement range up to 30okPa.To verify the advantages of high sensitivity,the sensor is integrated with a soft magnetic robot to demonstrate a biomimetic Venus flytrap.The ability to perceive weak stimuli allows the sensor to be used as a sensory and feedback window,realizing the capture of small live insects and the transportation of fragile objects. | Yongsong Luo Xiaoliang Chen Hongmiao Tian Xiangming Li Yangtianyu Lu Yang Liu Jinyou Shao | 2022 | Research2022，，4： | 0 |
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