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Recent progress in wide field-of-view optical receivers

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Chinese Science Bulletin 2009年第20期54卷 3618-3622页

作者： li guangyuan CAI lin XU AnShit State Key Laboratory of Advanced Optical Communication Systems & Networks School of Electronics Engineering and Computer Science Peking University Beijing 100871 China

The wide field-of-view(FOV) optical receiver has many advantages in optical wireless communication,sensing and ***,the FOV is limited by some tradeoffs of the receiver's components employing conventional optical ***,present mechanisms to extend the FOV are not *** realize the wide FOV receiver effectively,we propose surface plasmon polaritons(SPPs) as the potential *** examples are presented to lively illustrate SPPs' striking power to offer unexpected solutions to conventional *** is shown that unusual conditions should be explored to make use of SPPs under some *** of localized SPPs,which are independent of the incidence angle,are suggested as the mechanism for the wide FOV *** progress in the optimization of SPPs' excitation at oblique incidence is also reported.

关键词：光学接收器宽视场表面等离子体光无线通信许可证光接收机光学器件接收视场

A zebrafish tufm mutant model for the COXPD4 syndrome of aberrant mitochondrial function

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Journal of Genetics and Genomics 2024年第9期51卷 922-933页

作者： Ting li Tursunjan Aziz guangyuan li lin Zhang Jihua Yao Shunji Jia School of life Sciences Fudan UniversityShanghai 200438China State Key Laboratory of Membrane Biology Tsinghua-Peking Center for Life SciencesSchool of Life SciencesTsinghua UniversityBeijing 100084China State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China

Mitochondrial dysfunction is a critical factor leading to a wide range of clinically heterogeneous and often severe disorders due to its central role in generating cellular *** in the TUFM gene are known to cause combined oxidative phosphorylation deficiency 4(COXPD4),a rare mitochondrial disorder characterized by a comprehensive quantitative deficiency in mitochondrial respiratory chain(MRC)*** development of a reliable animal model for COXPD4 is crucial for elucidating the roles and mechanisms of TUFM in disease pathogenesis and benefiting its medical *** this study,we construct a zebrafish tufm−/−mutant that closely resembles the COXPD4 syndrome,exhibiting compromised mitochondrial protein translation,dysfunctional mitochondria with oxidative phosphorylation defects,and significant metabolic suppression of the tricarboxylic acid *** this COXPD4 zebrafish model,we comprehensively validate the clinical relevance of TUFM mutations and identify probucol as a promising therapeutic approach for managing *** data offer valuable insights for understanding mitochondrial diseases and developing effective treatments.

关键词： Tufm Mitochondria COXPD4 Disease model Zebrafish

Polarization-controlled dual resonant lattice Kerker effects

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Nano Research 2023年第2期16卷 3195-3200页

作者： Lei Xiong Xueqian Zhao Xiang Du Shuai Chen Yuanfu Lu Hongwei Ding guangyuan li School of Information Science and Engineering Yunnan UniversityKunming 650500China CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China School of Computer Electronic and InformationGuangxi UniversityNanning 530004China College of Physics and Electronic Technology Anhui Normal UniversityWuhu 241000China Tianjin H-Chip Technology Group Corporation Tianjin 300467China SIAT Branch Shenzhen Institute of Artificial Intelligence and Robotics for SocietyShenzhen 518055China

The generalized Kerker effects have attracted increasing interests in recent years due to their abilities to manipulate the far-field properties of ***,the dual-polarized generalized Kerker effect enabling different tailoring of orthogonally-polarized electromagnetic waves has not yet been ***,we demonstrate polarization-controlled dual resonant lattice Kerker effects in periodic silicon *** varying the incident angle,the electric dipole and magnetic dipole surface lattice resonances can spectrally overlap,causing zero reflectance and unitary transmittance,i.e.,the resonant lattice Kerker *** incident angle for achieving this effect can be tuned differently for s-and p-polarizations over large regions by varying the nanodisk size or the lattice *** proposed dual-polarized resonant lattice Kerker effects open up avenues for polarization-controlled manipulation of the phase and wavefront of light with metasurfaces.

关键词： Kerker effect surface lattice resonances dual-polarized silicon metasurface

Unidirectional plasmonic Bragg reflector based on longitudinally asymmetric nanostructures

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Chinese Physics B 2019年第7期28卷 269-272页

作者： Mingsong Chen Lulu Pan Yuanfu Lu guangyuan li School of Information and Communication Guilin University of Electronic Technology Guilin 541004 China Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China

Plasmonic Bragg reflectors are essential components in plasmonic *** we propose a novel type of plasmonic Bragg reflector, which has very high reflectance for the right-side incidence and meanwhile has extremely large absorption for the left-side *** device is composed of longitudinally asymmetric nanostructures in a metal–insulator–metal *** order to efficiently analyze, design, and optimize the reflection and transmission characteristics of the proposed device, we develop a semi-analytic coupled-mode *** show that the reflectance extinction ratio between plasmonic modes incident from the right-side and the left-side reaches 11 *** expect this device with such striking unidirectional reflection performance can be used as insulators in nanoplasmonic circuits.

关键词： plasmonic devices Bragg reflectors unidirectional reflection asymmetric nanostructures

Discovery of the Early Paleozoic post-collisional granites in northern margin ofthe Erguna massif and its geological significance

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Chinese Science Bulletin 2005年第23期50卷 2733-2743页

作者： WU Guang SUN Fengyue ZHAO Caisheng li Zhitong ZHAO Ailin PANG Qingbang li guangyuan College of Earth Sciences Jilin University Changchun 130026 China Shenyang Institute of Geology and Mineral Resources Shenyang 110032 China Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 China

The Luoguhe intrusion, located in MoheCounty, Heilongjiang Province, is mainly composed of mon-zogranite, quartz diorite and granodiorite, with minor dio-rite, tonalite, quartz monzodiorite, quartz monzonite, syeno-granite and alkali-feldspar granite. The intrusion can bedivided into two lithological units, i.e. quartz diorite andmonzogranite units, with affinities to high-K calc-alkalineseries. The quartz diorite unit (SiO2: 54.79%―58.30%Na2O/CaO: 0.79―1.53 and Shand index: 0.77―0.82) belongsto metaluminous rocks. And the monzogranite unit (SiO2:65.29%―66.45%, Na2O/CaO: 1.73―3.43 and Shand indexlies(δ Eu = 0.33―0.82), weak REE fractionation [(La/Yb)N =4.12―10.45], enrichments in Rb, Th, U, K, La, Ce, Nd, HfZr and Sm, but strong depletions of Ba, Nb, Ta, Sr, P and TiThese characteristics of major, REE and trace elements in-dicate that the intrusion was formed in a transitional tectonicsetting from compressional to extensional regime, which canbe classified as post-collisional granitoids. SHRIMP U-Pbzircon analyses yield ages of 517±9 and 504±8 Ma for thequartz diorite and monzogranite units, respectively. The dis-covery of Early Paleozoic post-collisional granites in thenorthern margin of the Erguna massif indicates that thenorthern branch of Paleo-Asian Ocean between Siberianplate and Erguna massif was closed in the Early Paleozoicand the Salair orogeny ended ca. 500 Ma ago.

关键词：花岗岩 U-Pb测年早古生代地球化学地质学

Quality factor enhancement of plasmonic surface lattice resonance by using asymmetric periods

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Chinese Physics B 2022年第1期31卷 359-363页

作者： Yunjie Shi Lei Xiong Yuming Dong Degui Sun guangyuan li Schools of Science Changchun University of Science and TechnologyChangchun 130022China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China School of Information Science and Engineering Yunnan UniversityKunming 650500China

We report that using asymmetric lattice periods can enhance the quality factor of plasmonic surface lattice resonances(SLRs)in two-dimensional array of metal-insulator-metal nanopillars in asymmetric dielectric *** results show that by adopting appropriate asymmetric lattice periods,the SLR quality factor can be enhanced by 24%compared with the scenario of symmetric *** find that the SLR quality factor is optimized when the resonance wavelength is closest to the Rayleigh cutoff *** also find that the SLRs effect is polarization sensitive in the proposed *** expect this work will advance the engineering of SLRs especially in asymmetric dielectric environments,and will promote their applications in sensing.

关键词： collective resonance plasmonic nanopillars surface lattice resonance

prpf4 is essential for cell survival and posterior lateral line primordium migration in zebrafish

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Journal of Genetics and Genomics 2018年第8期45卷 443-453页

作者： Yixia Wang Yanchao Han Pengfei Xu Shihui Ding guangyuan li Hongbin Jin Yaping Meng Anming Meng Shunji Jia State Key Laboratory of Membrane Biology Tsinghua-Peking Center for Life Sciences School of Life Sciences Tsinghua University

Prpf4 （pre-mRNA processing factor 4）, a key component of spliceosome, plays critical roles in pre-mRNA splicing and its mutations result in retinitis pigmentosa due to photoreceptor defects. In this study, we characterized a zebrafish prpf4t243 mutant harboring a Tol2 transposon-based gene trap cassette in the third intron of the prpf4 gene. Cells in the brain and spinal cord gradually undergo p53-dependent apoptosis after 28 hpf in prpf4t243 mutants, suggesting that a widespread function of prpf4 in neural cell survival. In addition, prpf4 is essential for survival of posterior lateral line primordial （pLLP） cells, prpf4 deficiency perturbs Fgf, Wnt/β-catenin and chemokine signaling pathways and impairs pLLP migration. RNA-Seq analysis suggests that prpf4 deficiency may impair spliceosome assembly, leading to compensatory upregulation of core spliceosomal genes and alteration of pre-mRNA splicing. Taken together, our studies uncover an essential role of prpf4 in pre-mRNA splicing, cell survival and pLLP migration.

关键词： prpf4 Splicing Apoptosisp LLP Zebrafish

THE COMPOSABIliTY PROBLEM OF THESEMANTICS OFXYZ/BE-COMMUNICATING PROCESSES

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Systems Science and Mathematical Sciences 1999年第S1期12卷 61-68,68-69页

作者： li guangyuan TANG Zhisong(Laboratory for Computer Science, Institute of Software, Academia Sinica,Beijing 100080 China)

Composability is vital to the specification and verification of concurrent systems. This paper is devoted to the composability of XYZ / BE- communicating *** show that parallel composition processes preserve all of th... 详细信息

关键词： linear temporal logic formal semantics communicating process parallelcomposition trace equivalence.

Graphene metasurface-based switchable terahertz half-/quarter-wave plate with a broad bandwidth

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Chinese Physics B 2023年第2期32卷 479-484页

作者：罗小青罗娟胡放荣李光元 Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China Guilin University of Electronic Technology Guilin 541004China

Metasurfaces incorporating graphene hold great promise for the active manipulation of terahertz waves. However,it remains challenging to design a broadband graphene-based terahertz metasurface with switchable functionality of half-wave plate(HWP) and quarter-wave plate(QWP). Here, we propose a graphene–metal hybrid metasurface for achieving broadband switchable HWP/QWP in the terahertz regime. Simulation results show that, by varying the Fermi energy of graphene from 0 eV to 1 eV, the function of the reflective metasurface can be switched from an HWP with polarization conversion ratio exceeding 97% over a wide band ranging from 0.7 THz to 1.3 THz, to a QWP with ellipticity above 0.92over 0.78 THz–1.33 THz. The sharing bandwidth reaches up to 0.52 THz and the relative bandwidth is as high as 50%.We expect this broadband and dynamically switchable terahertz HWP/QWP will find applications in terahertz sensing,imaging, and telecommunications.

关键词： terahertz metasurface waveplate graphene reconfigurable