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Tunable spin splitting of Laguerre–Gaussian beams in graphene metamaterials

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Photonics Research 2017年第6期5卷 203-207页

作者： wenguo zhu MENGJIANG JIANG HEYUAN GUAN JIANHUI YU HUIHUI LU JUN ZHANG ZHE CHEN Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Jinan University Department of Optoelectronic Engineering Jinan University Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes Jinan University

Optical spin splitting has attracted significant attention owing to its potential applications in quantum information and precision metrology. However, it is typically small and cannot be controlled efficiently. Here, we enhance the spin splitting by transmitting higher-order Laguerre–Gaussian(LG) beams through graphene metamaterial slabs. The interaction between LG beams and metamaterial results in an orbital-angularmomentum-(OAM) dependent spin splitting. The upper bound of the OAM-dependent spin splitting is found,which varies with the incident OAM and beam waist. Moreover, the spin splitting can be flexibly tuned by modulating the Fermi energy of the graphene sheets. This tunable spin splitting has potential applications in the development of spin-based applications and the manipulation of mid-infrared waves.

关键词： EF OAM Tunable spin splitting of Laguerre Gaussian beams in graphene metamaterials

Side Polished Fiber:A Versatile Platform for Compact Fiber Devices and Sensors

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Photonic Sensors 2023年第1期13卷 1-24页

作者： Linqing zhuO Jieyuan TANG wenguo zhu Huadan ZHENG Heyuan GUAN Huihui LU Yaofei CHEN Yunhan LUO Jun ZHANG Yongchun ZHONG Jianhui YU Zhe CHEN Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes Department of Optoelectronic EngineeringJinan UniversityGuangzhou 510632China Engineering Research Center on Visible Light Communication of Guangdong Province Department of Optoelectronic EngineeringJinan UniversityGuangzhou 510632China Key Laboratory of Visible Light Communications of Guangzhou Jinan UniversityGuangzhou 510632China

Side polished fiber(SPF)has a controllable average roughness and length of the side-polishing region,which becomes a versatile platform for integrating multiple materials to interact with the evanescent field to fabricate all-fiber devices and *** has been widely used in couplers,filters,polarizers,optical attenuators,photodetectors,modulators,and sensors for temperature,humidity,strain,biological molecules,chemical gas,and vector magnetic *** this article,an overview of the development history,fabrication techniques,fiber types,transmission characteristics,and varied recent applications of SPFs are ***,the fabrication techniques of SPFs are reviewed,including the V-groove assisted polishing technique and wheel polishing ***,the different types of SPFs and their characteristics are ***,various applications of SPFs are discussed and concluded theoretically and experimentally,including their principles and *** designing the device,the residual thickness and polishing lengths of the SPF need to be appropriately selected in order to obtain the best *** all-fiber devices and sensors is aimed at practical usability under harsh environments and allows to avoid the high coupling loss between optical fibers and on-chip integrated devices.

关键词： Side polished fiber(SPF) V-groove assisted polishing technique wheel polishing technique lab-on-fiber fiberdevices sensors

Photonic cavity enhanced high-performance surface plasmon resonance biosensor

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Photonics Research 2020年第4期8卷 448-456页

作者： GUI-SHI LIU XIN XIONG SHIQI HU WEICHENG SHI YAOFEI CHEN wenguo zhu HUADAN ZHENG JIANHUI YU NUR HIDAYAH AZEMAN YUNHAN LUO ZHE CHEN Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Jinan UniversityGuangzhou 510632China Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes Jinan UniversityGuangzhou 510632China Key Laboratory of Visible Light Communications of Guangzhou Jinan UniversityGuangzhou 510632China Photonics Technology Laboratory Centre of Advanced Electronic and Communication EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia

Herein we propose a novel strategy to enhance surface plasmon resonance(SPR)by introducing a photonic cavity into a total-internal-reflection *** photonic cavity,which is comprised of a highly reflective photonic crystal(PC),defect layers,and a gold(Au)film,enables Fabry–Perot(FP)resonances in the defect layers and therefore narrows the SPR resonance width in the metallic surface as well as increases the electric field intensity and penetration depth in the evanescent *** fabricated sensor exhibits a 5.7-fold increase in the figure of merit and a higher linear coefficient as compared with the conventional Au-SPR *** demonstrated PC/FP cavity/metal structure presents a new design philosophy for SPR performance enhancement.

关键词： Photonic cavity enhanced high-performance surface plasmon resonance biosensor

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舰载机弹射起飞安全性的影响因素分析

北京航空航天大学学报 2018年第11期44卷 2396-2404页

作者：董阿鹏李书朱文国吴伟潇北京航空航天大学航空科学与工程学院北京100083

为了全面考察舰载机(CBA)弹射起飞系统的安全性能,在绝对坐标系下,利用自然坐标法,建立了弹射起飞过程的多体耦合动力学模型,结合舰载机弹射仿真曲线,从舰载机加速度和飞行轨迹两方面研究了不同参数对弹射安全的影响规律。仿真结果表明... 详细信息

为了全面考察舰载机(CBA)弹射起飞系统的安全性能,在绝对坐标系下,利用自然坐标法,建立了弹射起飞过程的多体耦合动力学模型,结合舰载机弹射仿真曲线,从舰载机加速度和飞行轨迹两方面研究了不同参数对弹射安全的影响规律。仿真结果表明:在弹射滑跑阶段,弹射力对水平加速度影响较大,在自由飞行阶段,发动机推力对水平加速度影响较大,而起飞重量在整个弹射过程对加速度均有明显影响;定力栓临界值的增大对加速度、飞行轨迹影响不大,但需要考虑其带来的结构振动和时延效应;较长的剩余甲板可以增加离舰升力,从而有效减小离舰下沉量;舰船纵摇可引起飞行轨迹大幅下沉,应避免舰船纵摇位移最大的时刻离舰起飞,其中舰船运动引起牵制杆的提前释放也应是控制弹射时间的考虑因素之一;弹射起飞安全性设计是一个多变量寻优过程,单一要素的优化难以得到满意结果,需综合分析各要素的影响。

关键词：舰载机(CBA) 弹射起飞多体动力学分析动力学自然坐标法飞行安全

Optimized weak measurement of orbital angular momentum-induced beam shifts in optical reflection

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Photonics Research 2019年第11期7卷 1273-1278页

作者： Wenjin Long Jintao Pan Xinyi Guo Xiaohe Liu Haolin Lin Huadan Zheng Jianhui Yu Heyuan Guan Huihui Lu Yongchun Zhong Shenhe Fu Li Zhang wenguo zhu Zhe Chen Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Jinan UniversityGuangzhou 510632China Department of Optoelectronic Engineering Jinan UniversityGuangzhou 510632China School of Physics and Optoelectronic Engineering Foshan UniversityFoshan 528000China

Tiny but universal beam shifts occur when a polarized light beam is reflected upon a planar *** the beam shifts of Gaussian beams have been measured by the weak measurement technique, the weak measurement for orbital angular momentum(OAM)-induced spatial shifts of vortex beams is still ***, by elaborately choosing the preselection and postselection states, the tiny OAM-induced Goos–H?nchen and Imbert–Fedorov shifts are amplified at an air–prism interface. The maximum shifts along directions both parallel and perpendicular to the incident plane are theoretically predicted and experimentally verified with optimal preselection and postselection states. These maximum shifts can be used to determine the OAM of vortex beams.

关键词： beam momentum angular

Distance-controllable and direction-steerable opto-conveyor for targeting delivery

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Photonics Research 2020年第7期8卷 1124-1133页

作者： Zhen Che wenguo zhu Yaoming Huang Yu Zhang Linqing zhuo Pengpeng Fan Zhibin Li Huadan Zheng Wenjin Long Wentao Qiu Yunhan Luo Jun Zhang Jinghua Ge Jianhui Yu Zhe Chen Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes Guangdong Provincial Key Laboratory of Optical Fiber Sensing and CommunicationsJinan UniversityGuangzhou 510632China Department of Optoelectronic Engineering Jinan UniversityGuangzhou 510632China Department of Cell Biology Yale University School of MedicineNew HavenConnecticut 06510USA

Opto-conveyors have attracted widespread interest in various fields because of their non-invasive and non-contact delivery of micro/***,the flexible control of the delivery distance and the dynamic steering of the delivery direction,although very desirable in all-optical manipulation,have not yet been achieved by ***,using a simple and cost-effective scheme of an elliptically focused laser beam obliquely irradiated on a substrate,a direction-steerable and distance-controllable opto-conveyor for the targeting delivery of microparticles is ***,in the proposed scheme of the opto-conveyor,the transverse and longitudinal resultant forces of the optical gradient force and the optical scattering force result in the transverse confinement and the longitudinal transportation of microparticles,*** this study,it is experimentally shown that the proposed opto-conveyor is capable of realizing the targeting delivery for ***,the delivery distance of microparticles can be flexibly and precisely controlled by simply adjusting the irradiation *** simply rotating the cylindrical lens,the proposed opto-conveyor is capable of steering the delivery direction flexibly within a large range of azimuthal angles,from-75°to 75°.This study also successfully demonstrated the real-time dynamic steering of the delivery direction from-45°to 45°with the dynamical rotation of the cylindrical *** to its simplicity,flexibility,and controllability,the proposed method is capable of creating new opportunities in bioassays as well as in drug delivery.

关键词： simply cylindrical simplicity

High-sensitivity and fast-response fiber optic temperature sensor using an anti-resonant reflecting optical waveguide mechanism

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Photonics Research 2023年第8期11卷 1397-1407页

作者： ZHIBIN LI ZIYE WU zhuOQI LI LIANGXUN OU WENXIANG ZHANG ZHICONG LAI YU ZHANG MENGYUAN XIE JIEYUAN TANG wenguo zhu HUADAN ZHENG YONGCHUN ZHONG XIONG DENG XIHUA ZOU ZHE CHEN JIANHUI YU Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes Department of Optoelectronic EngineeringJinan UniversityGuangzhou 510632China Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Department of Optoelectronic EngineeringJinan UniversityGuangzhou 510632China Center for Information Photonics and Communications School of Information Science and TechnologySouthwest Jiaotong UniversityChengdu 611756China

Temperature sensing is essential for human health ***-sensitivity(>1 nm∕℃)fiber sensors always require long interference paths and temperature-sensitive materials,leading to a long sensor and thus slow response(6–14 s).To date,it is still challenging for a fiber optic temperature sensor to have an ultrafast(~ms)response simultaneously with high ***,a side-polished single-mode/hollow/single-mode fiber(SPSHSF)structure is proposed to meet the challenge by using the length-independent sensitivity of an anti-resonant reflecting optical waveguide *** a polydimethylsiloxane filled sub-nanoliter volume cavity in the SP-SHSF,the SP-SHSF exhibits a high temperature sensitivity of 4.223 nm/℃ with a compact length of 1.6 mm,allowing an ultrafast response(16 ms)and fast recovery time(176 ms).The figure of merit(FOM),defined as the absolute ratio of sensitivity to response time,is proposed to assess the comprehensive performance of the *** FOM of the proposed sensor reaches up to 263.94(nm/℃)∕s,which is more than two to three orders of magnitude higher than those of other temperature fiber optic sensors reported ***,a threemonth cycle test shows that the sensor is highly robust,with excellent reversibility and accuracy,allowing it to be incorporated with a wearable face mask for detecting temperature changes during human *** high FOM and high stability of the proposed sensing fiber structure provide an excellent opportunity to develop both ultrafast and highly sensitive fiber optic sensors for wearable respiratory monitoring and contactless in vitro detection.

关键词： fiber waveguide resonant

High-performance fiber-integrated multifunctional graphene-optoelectronic device with photoelectric detection and optic-phase modulation

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Photonics Research 2020年第12期8卷 1949-1957页

作者： LINQING zhuO PENGPENG FAN SHUANG ZHANG YUANSONG ZHAN YANMEI LINYU ZHANG DONGQUAN LI ZHEN CHE wenguo zhu HUADAN ZHENG JIEYUAN TANG JUN ZHANG YONGCHUN ZHONG WENXIAO FANG GUOGUANG LU JIANHUI YU ZHE CHEN Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes Department of Optoelectronic EngineeringJinan UniversityGuangzhou 510632China Engineering Research Center on Visible Light Communication of Guangdong Province Department of Optoelectronic EngineeringJinan UniversityGuangzhou 510632China Key Laboratory of Visible Light Communications of Guangzhou Jinan UniversityGuangzhou 510632China Science and Technology on Reliability Physics and Application of Electronic Component Laboratory China Electronic Product Reliability and Environmental Testing Research InstituteGuangzhou 510610China

In graphene-based optoelectronic devices,the ultraweak interaction between a light and monolayer graphene leads to low optical absorption and low responsivity for the photodetectors and relative high half-wave voltage for the phase ***,an integration of the monolayer graphene onto the side-polished optical fiber is demonstrated,which is capable of providing a cost-effective strategy to enhance the light–graphene interaction,allowing us to obtain a highly efficient optical absorption in graphene and achieve multifunctions:photodetection and optical phase *** a photodetector,the device has ultrahigh responsivity(1.5×10^(7) A/W)and high external quantum efficiency(>1.2×10^(9)%).Additionally,the polybutadiene/polymethyl methacrylate(PMMA)film on the graphene can render the device an optical phase modulator through the large thermo-optic effect of the *** a phase modulator,the device has a relatively low half-wave voltage of 3 V with a 16 dB extinction ratio in Mach–Zehnder interferometer configuration.

关键词： optoelectronic fiber modulator

Resonance-assisted light–control–light characteristics of SnS_2 on a microfiber knot resonator with fast response

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Photonics Research 2018年第12期6卷 1137-1143页

作者： HUIHUI LU ZHONGMIN WANG ZHIJIN HUANG JUN TAO HANQING XIONG WENTAO QIU HEYUAN GUAN HUAzhuO DONG JIANGLI DONG wenguo zhu JIANHUI YU YONGCHUN ZHONG YUNHAN LUO JUN ZHANG ZHE CHEN Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Department of Optoelectronic EngineeringJinan University Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes Jinan University

An all-optical light–control–light functionality with the structure of a microfiber knot resonator (MKR) coated with tin disulfide (SnS_2) nanosheets is experimentally demonstrated. The evanescent light in the MKR [with a resonance Q of ～59,000 and an extinction ratio (ER) of ～26 dB] is exploited to enhance light–matter interaction by coating a two-dimensional material SnS_2 nanosheet onto it. Thanks to the enhanced light–matter interaction and the strong absorption property of SnS_2, the transmitted optical power can be tuned quasi-linearly with an external violet pump light power, where a transmitted optical power variation rate ΔT with respect to the violet light power of ～0.22 dB∕mW is obtained. In addition, the MKR structure possessing multiple resonances enables a direct experimental demonstration of the relationship between resonance properties (such as Q and ER), and the obtained ΔT variation rate with respect to the violet light power. It verifies experimentally that a higher resonance Q and a larger ER can lead to a higher ΔT variation rate. In terms of the operating speed, this device runs as fast as ～3.2 ms. This kind of all-optical light–control–light functional structure may find applications in future all-optical circuitry, handheld fiber sensors, etc.

关键词： response fast experimental optical multiple pump can tin