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Characteristics of photonic bands generated by quadrangular multiconnected networks

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chinese Physics B 2013年第10期22卷 328-336页

作者：罗瑞芳杨湘波卢剑刘承宜 key laboratory of laser life science and Institute of laser life science of Ministry of Education College of BiophotonicsSouth China Normal University School of Physical Education and Sports science South China Normal University

In this paper, by means of the network equation and generalized dimensionless Floquet-Bloch theorem, we study the influences of the number of connected waveguide segments （NCWS） between adjacent nodes and the matching ratio of waveguide length （MRWL） on the photonic bands generated by quadrangular multiconnected networks （QMNs）, and obtain a series of formulae. It is found that multicombining networks （MCNs） and repetitive combining networks （RCNs） are equivalent to each other and they can all be simplified into the simplest fundamental combining systems. It would be useful for adjusting the number, widths, and positions of photonic bands, and would possess potential applications for the designing of all-optical devices and photonic network devices.

关键词： photonic band gap waveguide network multiconnected network

A saccharides sensor developed by symmetrical optical waveguide-based surface plasmon resonance

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Journal of Innovative Optical Health sciences 2015年第2期8卷 19-25页

作者： Ang Li Zhouyi Guo Qing Peng Chan Du Xida Han Le Liu Jun Guo Yonghong He Yanhong Ji moe key laboratory of laser life science&SATCM Third Grade laboratory of chinese medicine and photonics Technology College of Biophotonics South China Normal University Guangzhou 510631P.R.China Department of Ophthalmology Xinhua Hospital Shanghai Jiaotong University School of Medicine Shanghai 200092P.R.China Shenzhen key laboratory for Minimal Invasive Medical Technologies Graduate School at Shenzhen Tsinghua University Shenzhen 518055P.R.China moe key laboratory of laser life science College of Biophotonics South China Normal University Guangzhou 510631P.R.China

We proposed a new saccharides sensor developed by symmetrical optical waveguide(SOW)-based surface plasmon resonance(SPR).This unique MgF_(2)/Au/MgF_(2)/Analyte film structure results in longer suface plasmon wave(SPW)propagation lengths and depths,leading to an increment of *** this paper,we managed to decorate the dielectric interface(MgF_(2) layer)by depositing a thin polydopamine film as surface adherent that provides a platform for secondary reactions with the probe molecule.3-Aminophenylboronic acid(3-PBA)is chosen to be the saccharides sense probe molecule in the present *** aqueous huumnor of Diabetes and Cataract patient whose blood glucose level is normal are analyzed and the results dermonstrated that this sensor shows great potential in monitoring the blood siugar and can be adapted in the field of biological monitoring in the future.

关键词： Saccharides sensor surface plasmon resonance symmetrical optical waveguide 3-Aminophenylboronic acid dopamine

Generation of high-quality electron beams from a laser-based advanced accelerator

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chinese Physics C 2015年第6期39卷 98-103页

作者： Ahmed M.M.Elsied Nasr A.M.Hafz 李松 Mohammad Mirzaie Thomas Sokollik 张杰 key laboratory for laser Plasmas (moe) and Department of Physics & Astronomy Shanghai Jiao Tong University

At Shanghai Jiao Tong University（SJTU） we have established a research laboratory for advanced acceleration research based on high-power lasers and plasma technologies. In a primary experiment based on the laser wakefield acceleration（LWFA） scheme, multi-hundred Me V electron beams of reasonable quality are generated using 20–40 TW, 30 femtosecond laser pulses interacting independently with helium, neon, nitrogen and argon gas jet targets. The laser-plasma interaction conditions are optimized for stabilizing the electron beam generation from each type of gas. The electron beam pointing angle stability and divergence angle as well as the energy spectra from each gas jet are measured and compared.

关键词： accelerator pointing helium acceleration divergence interacting hundred independently Electron stabilizing

Specific photoacoustic cavitation through nucleus targeted nanoparticles for high-efficiency tumor therapy

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Nano Research 2020年第3期13卷 719-728页

作者： Yuan Wang Guangle Niu Shaodong Zhai Wenjia Zhang Da Xing moe key laboratory cf laser life science&Institute of laser life science South China Normal UniversityGuangzhou 510631China College of Biophotonics South China Normal UniversityGuangzhou 510631China key laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute cf Physics and ChemistryChinese Academy of SciencesBeijing 100190China Department of Pharmacology&Pharmacy Li Ka Shing Faculty of MedicineThe University of Hong Kongt PokfulamHong KongChina

As a new type of cancer treatment,photoacoustic(PA)therapy is based on PA shockwave for rapid,selective and effective killing of cancer *** nucleus has been widely used as a target for tumor therapy,which has obtained a very considerable therapeutic *** situ destruction of tumor cell nucleus by photoacoustic therapy has not been *** this paper,a highly efficient nucleus-targeted photoacoustic theranostic polymer was developed for fluorescence and photoacoustic dual-mode imaging-guided PA *** prepared polymer consists of nucleus targeting TAT peptide(TAT:YGRKKRRQRRR),hydrophilic chain poly(N,N-dimethylacrylamide)(PDMA),and near-infrared(NIR)light absorbing agent(hCyR),which can self-assemble to form nanoparticles of approximately 28 nm(denoted as TAT-PDMA-hCyR NPs).The designed nanoparticles show excellent nucleus targeting and tumor cell death(up to 80%)caused by DNA damage under pulsed laser irradiation compared to non-nucleus target counterpart PDMA-hCyR NPs without TAT peptide in *** expected,the fluorescence and PA dual-mode imaging observed that TAT-PDMA-hCyR NPs were able to passively target and enrich in tumors,providing an experimental basis for in vivo treatment and thus ensuring a significant tumor inhibition rate(about 92%).In conclusion,this study provides a new and practicable method for the development of nucleus-targeting nanoparticles as potential theranostic agent for in vivo cancer imaging and therapy.

关键词： photoacoustic therapy nucleus near-infrared light targeted therapy

Conformation-dependent surface-enhanced Raman scattering of graphene oxide/metal nanoparticle hybrids

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chinese Optics Letters 2013年第8期11卷 97-99页

作者：刘智明钟会清郭周义杨必文 moe key laboratory of laser life science and SATCM Third Grade laboratory of chinese medicine and photonics Technology College of BiophotonicsSouth China Normal University

Graphene oxide （GO）/Ag nanoparticle （NP） hybrids are obtained by in situ reduction of Ag NPs on GO sheets. In this letter, the influence of the conformation of GO sheets on the surface-enhanced Raman scattering （SERS） effect of GO/Ag NPs is investigated by covalently grafting folic acid （FA） molecules onto graphite sheets. SERS measurements are conducted in aqueous solutions with different pH values. Data show that the SERS signals of FA are pH dependent, consistent with the morphological changes of GO sheets.

关键词： Conformations Graphene Nanoparticles Raman scattering Surface scattering

Enhanced Ferromagnetism of CrI3 Bilayer by Self-Intercalation

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chinese Physics Letters 2020年第10期37卷 114-119页

作者： Yu Guo Nanshu Liu Yanyan Zhao Xue Jiang Si Zhou Jijun Zhao moe key laboratory of Materials Modification by laser Ion and Electron BeamsDalian University of TechnologyDalian 116024China

Two-dimensional(2D)ferromagnets with high Curie temperature have long been the pursuit for electronic and spintronic *** 3 is a rising star of intrinsic 2D ferromagnets,however,it suffers from weak exchange *** we propose a general strategy of self-intercalation to achieve enhanced ferromagnetism in bilayer CrI *** show that filling either Cr or I atoms into the van der Waals gap of stacked and twisted CrI 3 bilayers can induce the double exchange effect and significantly strengthen the interlayer ferromagnetic *** to our first-principles calculations,the intercalated native atoms act as covalent bridge between two CrI 3 layers and lead to discrepant oxidation states for the Cr *** theoretical results offer a facile route to achieve high-Curie-temperature 2D magnets for device implementation.

关键词： exchange twisted ferromagnetic

Enhancement of third harmonic generation in air filamentation using obstacles

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chinese Physics B 2015年第3期24卷 1-4页

作者：刘晓龙鲁欣杜志贵马景龙李玉同张杰 Academy of Opto-electronics Chinese Academy of Sciences Beijing National laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences key laboratory for laser Plasmas (moe) and Department of Physics Shanghai Jiao Tong University

The intensity of third harmonic emission in air filamentation disturbed by copper fibers and alcohol droplets has been investigated experimentally. Enhancement of the third harmonic emission up to more than one order of magnitude has been observed. The physical mechanism of third harmonic enhancement is attributed to suppression of the destructive interference by comparison of the experimental results and it is closely related to the type, size, and relative position of the obstacles.

关键词： third harmonic emission filamentation femtosecond laser pulse

Hydrodynamic metamaterials for flow manipulation:Functions and prospects

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chinese Physics B 2022年第9期31卷 87-94页

作者： Bin Wang Jiping Huang School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China Department of Physics State Key Laboratory of Surface Physicsand Key Laboratory of Micro and Nano Photonic Structures(MOE)Fudan UniversityShanghai 200438China

As an emerging branch in the area of flow control,hydrodynamic metamaterials have received considerable attention because of their novel flow control *** this review,we present prominent studies on hydrodynamic metamateri-als in porous media,non-porous media,creeping flows,and non-creeping flows from several *** particular,for hydrodynamic cloaking metamaterials,we unify the descriptive form of transformation hydrodynamics for hydrodynamic metamaterials in porous and non-porous media by the hydrodynamic governing ***,we summarize and out-look the current shortcomings and challenges of current hydrodynamic metamaterials and propose possible future research directions,especially for microfluidics,exotic fluids,hydrodynamic cloaking in high Reynolds numbers,and turbulence.

关键词： flow control metamaterials hydrodynamic cloaks drag reduction liquid diodes

SINAT E3 ligases regulate the stability of the ESCRT component FREE1 in response to iron deficiency in plants

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Journal of Integrative Plant Biology 2020年第9期62卷 1399-1417页

作者： Zhidan Xiao Chao Yang Chuanliang Liu Lianming Yang Shuhong Yang Jun Zhou Faqiang Li Liwen Jiang Shi Xiao Caiji Gao Wenjin Shen Guangdong Provincial key laboratory of Biotechnology for Plant Development School of Life SciencesSouth China Normal UniversityGuangzhou510631China moe key laboratory of laser life science&Institute of laser life science College of BiophotonicsSouth China Normal UniversityGuangzhou510631China College of life sciences South China Agricultural UniversityGuangzhou510642China School of life sciences Center for Cell&Developmental Biology and State Key Laboratory of AgrobiotechnologyThe Chinese University of Hong KongNew TerritoriesHong KongChina State key laboratory of Biocontrol Guangdong Provincial Key Laboratory of Plant ResourcesSchool of Life SciencesSun Yat-sen UniversityGuangzhou510275China

The endosomal sorting complex required for transport (ESCRT) machinery is an ancient, evolutionarily conserved membrane remodeling complex that is es-sential for multivesicular body (MVB) biogenesis in eu-karyotes. FYVE DOMAIN PROTEIN REQUIRED FOR EN-DOSOMAL SORTING 1 (FREE1), which was previously identified as a plant-specific ESCRT component, modu-lates MVB-mediated endosomal sorting and autophagic degradation. Although the basic cellular functions of FREE1 as an ESCRT component have been described, the regulators that control FREE1 turnover remain unknown. Here, we analyzed how FREE1 homeostasis is mediated by the RING-finger E3 ubiquitin ligases, SINA of Arabi-dopsis thaliana (SINATs), in response to iron deficiency. Under iron-deficient growth conditions, SINAT1-4 were induced and ubiquitinated FREE1, thereby promoting its degradation and relieving the repressive effect of FREE1 on iron absorption. By contrast, SINAT5, another SINAT member that lacks ubiquitin ligase activity due to the absence of the RING domain, functions as a protector protein which stabilizes FREE1. Collectively, our findings uncover a hitherto unknown mechanism of homeostatic regulation of FREE1, and demonstrate a unique regu-latory SINAT–FREE1 module that subtly regulates plant response to iron deficiency stress.

关键词： component sorting thereby