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Light focusing in linear arranged symmetric nanoparticle trimer on metal film system

Chinese Physics B 2022年第1期31卷 540-546页

作者：唐裕霞王蜀霞黄映洲方蔚瑞 State Key Laboratory of Coal Mine Disaster Dynamics and Control and Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials College of PhysicsChongqing UniversityChongqing 400044China Applied Physics School of Computer Science and Information EngineeringChongqing Technology and Business UniversityChongqing 400067China Key Laboratory of Materials Modification by Laser Electronand Ion Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024China

Benefiting from the induced image charge on film surface,the nanoparticle aggregating on metal exhibits interesting optical *** this work,a linear metal nanoparticle trimer on metal film system has been investigated to explore the novel optical *** the electric field and surface charge distributions demonstrate the light is focused on film greatly by the nanoparticles at two sides,which could be strongly modulated by the wavelength of incident *** the influence of nanoparticle in middle on this light focusing ability has also been studied here,which is explained by the plasmon hybridization *** finding about light focusing in nanoparticle aggregating on metal film not only enlarges the novel phenomenon of surface plasmon but also has great application prospect in the field of surface-enhanced spectra,surface catalysis,solar cells,water splitting,etc.

关键词： electric field enhancement light focusing nanoparticle trimer on metal film system plasmonic hybridization

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Engineering Geometric Electrodes for electric field-Enhanced High-Performance Flexible In-Plane Micro-Supercapacitors

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Energy & Environmental Materials 2023年第4期6卷 114-120页

作者： Jihong Kim Sung Min Wi Jong-Guk Ahn Sangjun Son Hee Young Lim Yeonsu Park Hye Ji Eun Jong Bae Park Hyunseob Lim Sangyeon Pak A-Rang Jang Young-Woo Lee Department of Energy Engineering Soonchunhyang UniversityAsan 31538Korea Department of Chemistry Gwangju Institute of Science and TechnologyGwangju 61005Korea Jeonju Centre Korea Basic Science InstituteJeonju 54907Korea Prof.S.Pak School of Electronic and electrical Engineering Hongik UniversitySeoul 04066Korea Division of electrical Electronic and Control EngineeringKongju National UniversityCheonan 31080Korea

In plane micro-supercapacitors that are miniaturized energy storage components have attracted significant attention due to their high power densities for various ubiquitous and sustainable device systems as well as their facile integration on various flexible/wearable *** implement the micro-supercapacitors in various practical applications that can accompany solid state or gel electrolyte and flexible substrates,ions must be readily transported to electrodes for achieving high power ***,we show large enhancement in electrochemical properties of flexible,inplane micro-supercapacitor using sharp-edged interdigitated electrode design,which was simply fabricated through direct laser scribing *** sharp-edged electrodes allowed strong electric field to be induced at the corners of the electrode fingers which led to the greater accumulation of ions near the surface of electrode,significantly enhancing the energy storage performance of *** electric field-enhanced in-plane micro-supercapacitor showed the volumetric energy density of 1.52 Wh L^(−1)and the excellent cyclability with capacitive retention of 95.4%after 20000 *** further showed various practicability of our sharp-edged design in micro-supercapacitors by showing circuit applicability,mechanical stability,and air *** results present an important pathway for designing electrodes in various energy storage devices.

关键词： electric field enhancement flexible energy storage device microsupercapacitors sharp electrodes

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Multiple plasmon couplings in 3D hybrid Au-nanoparticles-decorated Ag nanocone arrays boosting highly sensitive surface enhanced Raman scattering

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Nano Research 2022年第1期15卷 317-325页

作者： Zewen Zuo Lianye Sun Yongbin Guo Lujun Zhang Junhu Li Kuanguo Li Guanglei Cui Anhui Province Key Laboratory of Optoelectric Materials Science and Technology(OEMST) Key Laboratory of Functional Molecular SolidsMinistry of EducationSchool of Physics and Electronics InformationAnhui Normal UniversityWuhu 241002China

Plasmon coupling is an essential strategy to realize strong local electromagnetic(EM)field which is crucial for high-performance plasmonic *** this work,multiple plasmon couplings are demonstrated in three-dimensional(3D)hybrid plasmonic systems composed of polydimethylsiloxane-supported ordered silver nanocone(AgNC)arrays decorated with high-density gold nanoparticles(AuNPs)which are fabricated by a template-assisted physical vapor deposition *** interparticle coupling,particle-film coupling,inter-cone coupling,and particle-cone coupling are revealed by numerical simulations in such composite nanostructures,which produce intense and high-density EM hot spots,boosting highly sensitive and reproducible surface enhanced Raman scattering(SERS)detection with an enhancement factor of-1.74×10^(8).Furthermore,a linear correlation between logarithmic Raman intensity and logarithmic concentration of probe molecules is observed in a large concentration *** results offer new ideas to develop novel plasmonic devices,and provide alternative strategy to realize flexible and high-performance SERS sensors for trace molecule detection and quantitative analysis.

关键词： multiple plasmon coupling electric field enhancement nanocone array three-dimensional hybrid surface enhanced Raman scattering(SERS)substrate

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Optical anapole modes in hybrid metal–dielectric nanoantenna for near-field enhancement and optical sensing

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Chinese Physics B 2023年第11期32卷 296-305页

作者：王德宝吕靖薇刘伟任艳茹李薇许鑫辰刘超朱剑豪 School of Physics and Electronic Engineering Northeast Petroleum UniversityDaqing 163318China Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong Kong 999077China

Metal–dielectric nanostructures in the optical anapole modes are essential for light–matter interactions due to the low material loss and high near-field enhancement. Herein, a hybrid metal–dielectric nanoantenna composed of six wedgeshaped gold(Au) nanoblocks as well as silica(SiO2) and silicon(Si) nanodiscs is designed and analyzed by the finite element method(FEM). The nanoantenna exhibits flexibility in excitation and manipulation of the anapole mode through the strong coupling between the metal and dielectrics, consequently improving the near-field enhancement at the gap. By systematically optimizing the structural parameters, the electric field enhancement factors at wavelengths corresponding to the anapole modes(AM1 and AM2) can be increased to 518 and 1482, respectively. Moreover, the nanoantenna delivers great performance in optical sensing such as a sensitivity of 550 nm/RIU. The results provide guidance and insights into enhancing the coupling between metals and dielectrics for applications such as surface-enhanced Raman scattering and optical sensing.

关键词： light-matter interaction metal-dielectric nanoantenna anapole mode electric field enhancement optical sensing

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Plasmon coupling in the double-sector structure

Plasmon coupling in the double-sector structure

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第十九届全国光散射学术会议

作者： Jianxia Qi Xinwei Zha Wei Gao Qing Yan Han Jun Dong School of Science Xi’an University of Posts and Telecommunications

＜正＞A silver nanostructure consisting of double sectors is proposed in this *** the plasmon resonance and electric field enhancement have been investigated *** is found that in this structure the multiple

关键词： Plasmon resonance Plasmon coupling electric field enhancement

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