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Waveguide-integrated optical modulators with two-dimensional materials

Journal of Semiconductors 2023年第11期44卷 8-25页

作者： Haitao Chen Hongyuan Cao Zejie Yu Weike Zhao Daoxin Dai State Key Laboratory for Modern Optical Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityZijingang CampusHangzhou 310058China College of Advanced Interdisciplinary Studies&Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices National University of Defense TechnologyChangsha 410073China Nanhu Laser Laboratory National University of Defense TechnologyChangsha 410073China Ningbo Research Institute Zhejiang UniversityNingbo 315100China

Waveguide-integrated optical modulators are indispensable for on-chip optical interconnects and optical *** cope with the ever-increasing amount of data being generated and consumed,ultrafast waveguide-integrated optical modulators with low energy consumption are highly *** recent years,two-dimensional(2D)materials have attracted a lot of attention and have provided tremendous opportunities for the development of high-performance waveguide-integrated optical modulators because of their extraordinary optoelectronic properties and versatile *** paper reviews the state-of-the-art waveguide-integrated optical modulators with 2D materials,providing researchers with the developing trends in the field and allowing them to identify existing challenges and promising potential ***,the concept and fundamental mechanisms of optical modulation with 2D materials are ***,a review of waveguide-integrated optical modulators employing electro-optic,all-optic,and thermo-optic effects is ***,the challenges and perspectives of waveguide-integrated modulators with 2D materials are discussed.

关键词： optical modulation two-dimensional(2D)materials on-chip waveguide

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Boosting the efficiency of quantum dot–sensitized solar cells over 15%through light-harvesting enhancement

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SusMat 2023年第4期3卷 543-554页

作者： Han Song Haoran Mu Jian Yuan Baiquan Liu Gongxun Bai Shenghuang Lin Songshan Lake Materials Laboratory DongguanGuangdongChina Institute of Physics Chinese Academy of ScienceBeijingChina School of Electronics and Information Technology Sun Yat-Sen UniversityGuangzhouGuangdongChina Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province China Jiliang UniversityHangzhouChina

How to improve the capacity of light-harvesting is still an important point and essential strategy for the assembling of high-efficiency quantum dot–sensitized solar cells(QDSCs).A believable approach is to implant new light absorption materials into QDSCs to stimulate the charge ***,the few-layer black phosphorus quantum dots(BPQDs)are synthesized by electrochemical intercalation technology using bulk BP as *** the obtained BPQDs are deposited onto the surface of Zn–Cu–In–S–Se(ZCISSe)QD-sensitized TiO2 substrate to serve as another light-harvesting material for the first *** experimental results have shown that BPQDs can not only increase the absorption intensity by photoanode but also reduce unnecessary charge recombination processes at the interface of photoanode/*** optimizing the size and deposition process of BPQDs,the champion power conversion efficiency of ZCISSe QDSCs is increased to 15.66%(26.88 mA/cm2,Voc=0.816 V,fill factor[FF]=0.714)when compared with the original value of 14.11%(Jsc=25.41 mA/cm^(2),Voc=0.779 V,FF=0.713).

关键词： black phosphorus quantum dots high-efficiency light-harvesting quantum dot–sensitized solar cells

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Flexible high-resolution thin micropolarizers for imaging polarimetry

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Chinese Optics Letters 2023年第3期21卷 60-65页

作者：吴艳杨阳尹悦代林茂李晓春黄晖辉文双春 Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education and Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices School of Physics and ElectronicsHunan UniversityChangsha 410082China Shenzhen Lubon Technology Co. Ltd.Shenzhen 518000China

More durable[with high impact force],lighter,and more compact flexible azo dye micropolarizers are attractive candidates for low-cost,simple polarization imaging *** liquid crystal polymer[LCP],as an emerging material developed by photo-alignment technology,is a potential material for organizing the long-range ordered structure of azo ***,little research has been done on LCP aligned azo *** paper points out and solves a key problem that restricts the fabrication of high-precision arrays in guest[azo dye]-host[LCP]systems:the doping of dyes leads to disorder of the LCP during *** solving the problem,the relationship between the thickness of the LCP and the extinction ratio of the polarizing film was investigated,which effectively improved the extinction *** of azo dye molecules in the range of 2μm[0°-180°]and arrays of micropolarizers[0°,45°,90°,-45°]with 8μm×8μm pixel pitch was achieved by laser direct writing *** bending cycle test demonstrates the mechanical stability of the ultrathin flexible *** flexible patterned polarizer with robust chemical and mechanical stabilities provides a flexible way to capture the polarization of the light and highly integrated advanced flexible optoelectronic devices.

关键词： micropolarizer polarimetric imaging polarimetry azo dye polarization-sensitive devices

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General deep learning framework for emissivity engineering

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Light(Science & Applications) 2023年第12期12卷 2755-2767页

作者： Shilv Yu Peng Zhou Wang Xi Zihe Chen Yuheng Deng Xiaobing Luo Wangnan Li Junichiro Shiomi Run Hu School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan 430074China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053 HubeiChina Hubei Longzhong Laboratory Wuhan University of Technology(Xiangyang Demonstration Zone)Xiangyang 441000 HubeiChina Department of Mechanical Engineering The University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-8654Japan

Wavelength-selective thermal emitters(WS-TEs)have been frequently designed to achieve desired target emissivity spectra,as a typical emissivity engineering,for broad applications such as thermal camouflage,radiative cooling,and gas sensing,***,previous designs require prior knowledge of materials or structures for different applications and the designed WS-TEs usually vary from applications to applications in terms of materials and structures,thus lacking of a general design framework for emissivity engineering across different ***,previous designs fail to tackle the simultaneous design of both materials and structures,as they either fix materials to design structures or fix structures to select suitable ***,we employ the deep Q-learning network algorithm,a reinforcement learning method based on deep learning framework,to design multilayer *** demonstrate the general validity,three WS-TEs are designed for various applications,including thermal camouflage,radiative cooling and gas sensing,which are then fabricated and *** merits of the deep Q-learning algorithm include that it can(1)offer a general design framework for WS-TEs beyond one-dimensional multilayer structures;(2)autonomously select suitable materials from a self-built material library and(3)autonomously optimize structural parameters for the target emissivity *** present framework is demonstrated to be feasible and efficient in designing WS-TEs across different applications,and the design parameters are highly scalable in materials,structures,dimensions,and the target functions,offering a general framework for emissivity engineering and paving the way for efficient design of nonlinear optimization problems beyond thermal metamaterials.

关键词： framework multilayer autonomous

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Three-Layer Matrix Ring Data Center Interconnect Based on FSO technology

Three-Layer Matrix Ring Data Center Interconnect Based on FS...

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2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024

作者： Su, Jianning Kong, Qian Lu, Xiaowei Liu, Liming Yi, Zichuan Pan, Xinjian School of Electronic and Information Engineering University of Electronic Science and Technology of China Zhongshan Institute Zhongshan528402 China College of Physics and Optoelectronic Engineering Shenzhen University SZU Shenzhen 518060 China Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province Shenzhen Key Lab of Micro-Nano Photonic Information Technology State Key Laboratory of Radio Frequency Heterogeneous Integration College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China

This paper proposes a three-layer grid matrix ring data center interconnect using Free Space Optical Communication as the inter-layer connection technology, which simplifies the wiring complexity and offers more diver... 详细信息

ISBN: (纸本)9798350379266

关键词： Data communication systems

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平面/体异质结结构全色倍增型有机光电探测器

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Science China Materials 2023年第3期66卷 1172-1179页

作者：虢德超杨丽清李骥何果郑景博陶思哲杨德志王林格 Agafonov Vadim 马东阁 Center for Aggregation-Induced Emission Institute of Polymer Optoelectronic Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesGuangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsState Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640China South China Advanced Institute for Soft Matter Science and Technology School of Emergent Soft MatterGuangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and DevicesSouth China University of TechnologyGuangzhou 510640China Moscow Institute of Physics and Technology Dolgoprudny 141700Russia

宽带有机光电探测器(OPDs)可以集成到各种可穿戴设备中,在健康监测等领域显示出巨大的应用潜力.这里,我们以酞菁铅(PbPc)和富勒烯(C70)小分子分别作为给体和受体,基于MoO_(3)俘获电子辅助空穴隧道注入的机制实现了高性能宽带倍增型有机... 详细信息

宽带有机光电探测器(OPDs)可以集成到各种可穿戴设备中,在健康监测等领域显示出巨大的应用潜力.这里,我们以酞菁铅(PbPc)和富勒烯(C70)小分子分别作为给体和受体,基于MoO_(3)俘获电子辅助空穴隧道注入的机制实现了高性能宽带倍增型有机光电探测器(PM-OPDs).为了控制PbPc分子的晶相结构,我们分别制备了PbPc:C70体异质结(BHJ)和PbPc/C70平面异质结(PHJ)器件.可以看出,PHJ器件表现出更强的近红外吸收特性,即更有利于PbPc分子形成三斜相结构.我们进一步使用具有吸收互补特性的材料(PbPc和SubPc)作为有源层,采用PHJ/BHJ混合异质结结构,制备了在300–1000 nm范围内平坦的全色PM-OPDs.在-8 V反向偏压下,制得的全色PM-OPDs在整个光谱响应范围内的外量子效率都超过1000%.最后,我们在聚对苯二甲酸乙二醇酯基板上制备了柔性全色PM-OPDs,并成功地实现了人体脉搏信号的检测.本文通过设计器件结构和选择合适的材料,为获得高性能全色PM-OPDs提供了一种新策略.

关键词：有机光电探测器光谱响应范围外量子效率异质结结构反向偏压有源层聚对苯二甲酸乙二醇酯可穿戴设备

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Terahertz dual-beam leaky-wave antenna based on multi-mode spoof surface plasmon polariton waveguide

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optoelectronics Letters 2025年

作者： BAI Yukun HAN Yuanqing Tianjin Key Laboratory of Film Electronic and Communication Devices， Engineering Research Center of Optoelectronic Devices and Communication Technology， Ministry of Education， School of Integrated Circuit Science and Engineering， Tianjin University of Technology

In this paper， a terahertz dual-beam leaky-wave antenna (LWA) based on a multi-mode spoof surface plasmon polariton (SSPP) waveguide is proposed. By dispersion engineering of the SSPP transmission line (SSPP TL)， multiple modes are excited on the SSPP TL. A dual-beam LWA is constructed based on the radiation from the first space harmonics of the guided fundamental mode and the first higher-order mode. The simulation results show that the antenna radiates frequency-dependent dual beams in the 1.9 ～ 2.6 THz operating frequency band. The average gains for the two beams are 12.9 dBi and 8.2 dBi， respectively. The compact dual-beam LWA is promising in the application of wireless communication and radar systems.

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Mass transport induced structural evolution and healing of sulfur vacancy lines and Mo chain in monolayer MoS_(2)

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Rare Metals 2022年第1期41卷 333-341页

作者： Xiao-Wei Wang Lin-Fang Hou Wei Huang Xi-Biao Ren Wei Ji Chuan-Hong Jin State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Department of Physics Beijing Key Laboratory of Optoelectronic Functional Materials and Micro-Nano DevicesRenmin University of ChinaBeijing 100872China Hunan Institute of Advanced Sensing and Information Technology Xiangtan UniversityXiangtan 411105China

Defects play vital roles in tailoring structures and properties of materials including the atomically thin two-dimensional(2D)materials,and increasing demands are requested to find effective ways to realize the defect engineering,i.e.,tuning the defects and thus the materials’structure–property in a well-controlled ***,we propose a novel method to tune the structures and configurations of one-dimensional(1D)line defects in monolayer MoS2 via mass transport induced structural *** using atomic-resolved annular dark-field scanning transmission electron microscopy(ADF-STEM),we demonstrate in situ that sulfur vacancy line defect can be healed locally into defect-free MoS_(2)lattice via the desorption of Mo atoms from vacancy lines and adsorption into a moving Mo ***,directional transport of Mo atoms(or Mo cluster)along the sulfur vacancy lines can induce the formation of Mo *** a mass transport induced defect tuning provides more operational routes for the rational defect designing and property tuning in MoS_(2)as well as other related 2D materials.

关键词： MoS_(2) Defect engineering In situ transmission electron microscopy(TEM) Mass transport Line defect

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High Mobility and Reliability Oxide Stacked TFT for Application to Next Generation Display

High Mobility and Reliability Oxide Stacked TFT for Applicat...

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International Symposium, Seminar, and Exhibition, Display Week 2024

作者： Luo, Chuanbao Yao, Jiangbo Ding, Wei Zhou, Kai Liu, Juan Liu, Nian Zhan, Xiaojun Zhang, Xin TCL China Star Optoelectronics Display Technology Co. Ltd Shenzhen Guangdong China Shenzhen China Star Optoelectronics Semiconductor Display Technology Co. Ltd Shenzhen Guangdong China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou China

The stacked structure thin film transistors (TFT) has caused the widespread attention to achieve high mobility and reliability simultaneously. To ensure the stacked structure TFT application to mass production, it is critical to reduce the number of mask-count. In this paper, 8-mask-count stacked TFT-array process using the first semiconductor layer overlapped with the source and drain layer directly, which is the first layer on the glass substrate, is studied. By adopting this novel process, the device mobility is 25.4 cm2/Vs, which is more than twice that of conventional top-gate self-aligned a-IGZO device. Besides, the Vth under the positive bias stress of 30V and negative bias temperature illumination stress of -30V for 1 h is +0.41V and -0.13V, respectively, achieving the stability to the level of a-IGZO TFTs. © 2024, John Wiley and Sons Inc. All rights reserved.

关键词： Thin film transistors

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Over 18.2% efficiency of layer–by–layer all–polymer solar cells enabled by homoleptic iridium(Ⅲ)carbene complex as solid additive

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Science Bulletin 2024年第18期69卷 2862-2869页

作者： Hang Zhou Yingjie Sun Miao Zhang Yuheng Ni Fenghua Zhang Sang Young Jeong Tianhuan Huang Xiong Li Han Young Woo Jian Zhang Wai-Yeung Wong Xiaoling Ma Fujun Zhang Key Laboratory of Luminescence and Optical Information(Ministry of Education) Beijing Jiaotong UniversityBeijing 100044China Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong Kong 999077China Department of Physics Beijing Technology and Business UniversityBeijing 100048China Organic Optoelectronic Materials Laboratory Department of ChemistryCollege of ScienceKorea UniversitySeoul 02841Republic of Korea School of Materials Science and Engineering Engineering Research Center of Electronic Information Materials and DevicesMinistry of EducationGuangxi Key Laboratory of Information MaterialsGuilin University of Electronic TechnologyGuilin 541004China Tangshan Research Institute of Beijing Jiaotong University Tangshan 063000China

The vertical phase distribution of active layers plays a vital role in balancing exciton dissociation and cha rge transport for achieving efficient polymer solar cells(PSCs).The layer-by-layer(LbL)PSCs are commonly prepared by using sequential spin-coating method from donor and acceptor solutions with distinct solvents and solvent *** enhanced exciton dissociation is expected in the LbL PSCs with efficient charge transport in the relatively neat donor or acceptor *** this work,a series of LbL all-polymer solar cells(APSCs)were fabricated with PM6 as donor and PY-DT as acceptor,and triplet material m-Ir(CPmPB)_(3)is deliberately incorporated into PY-DT layer to prolong exciton lifetimes of active *** power conversion efficiency(PCE)of LbL APSCs is improved to 18.24%from 17.32%by incorporating 0.3 wt%m-Ir(CPMPB)_(3)in PY-DT layer,benefiting from the simultaneously enhanced short-circuit current density(Isc)of 25.17 mA cm^(-2)and fill factor(FF)of 74.70%.The enhancement of PCE is attributed to the efficient energy transfer of m-Ir(CPmPB)_(3)to PM6 and PY-DT,resulting in the prolonged exciton lifetime in the active layer and the increased exciton diffusion *** efficient energy transfer from m-Ir(CPmPB)_(3)to PM6 and PY-DT layer can be confirmed by the increased photoluminescence(PL)intensity and the prolonged PL lifetime of PM6 and PY-DT in PM6+m-Ir(CPmPB)_(3)and PY-DT+m-Ir(CPmPB)_(3)*** study indicates that the triplet material as solid additive has great potential in fabricating efficient LbL APSCs by prolonging exciton lifetimes in active layers.

关键词： Layer-by-layer All-polymer solar cells Additive strategy Triplet material Energy transfer

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