Quantitative insights into non-uniform plasmonic hotspots due to symmetry breaking induced by oblique incidence

Zhou, Yong1; Li, Hongliang2; Zhang, Guanhua3; Wei, Dong3; Zhang, Lan2; Meng, Yujie1; Zheng, Xianfeng1; Ma, Zhibo3; Zeng, Jie2; Yang, Xueming3,4

2020-09-21

10.1039/d0cp03470c

PHYSICAL CHEMISTRY CHEMICAL PHYSICS   影响因子和分区

1463-9076

1463-9084

Localized surface plasmon resonance draws great attentions mainly due to its enhanced near electric field,i.e., plasmonic hotspots. The symmetry breakingviaoblique incidence of light is predicted to influence the intensity of plasmonic hotspots. However, relevant experimental investigation in quantitative comparison with theory is still lacking. Here, we visualize the polarization-dependent plasmonic hotspots of a triangular Ag nanoplate through oblique-incidence photoemission electron microscopy (PEEM), revealing a non-uniform near-field enhancement. Under oblique incidence, two bright spots and one dark spot were identified in the polarization-averaged PEEM image, different from that for normal illumination where bright spots with equal intensity are anticipated. In polarization-dependent PEEM images, plasmonic hotspots appeared at specific corners of a triangular Ag nanoplate, and rotated in a manner consistent with the rotation of polarization angle. The experimental intensity maps of the photoelectron were well reproduced by simulation on a quantitative level. This work provides a quantitative understanding of how the orientation of incidence light relative to a plasmonic antenna influences the near-field enhancement.

SCI ; EI

英语

其他

National Natural Science Foundation of China[21503001][21873004][11674003][21688102][21673003][21403222][21673236][U19A2015] ; National Science Fund for Distinguished Young Scholars[21925204] ; Open Fund of the State Key Laboratory of Molecular Reaction Dynamics in DICP, CAS[SKLMRD-K201709][SKLMRD-K201815] ; Strategic Priority Research Program of Chinese Academy of Science[XDB17000000] ; National Key Research and Development Program of the MOST of China[2016YFA0200603] ; Anhui Normal University Doctoral Program[2016XJJ128] ; Anhui Provincial Natural Science Foundation Project[1708085QB41] ; Natural Science Foundation of Liaoning Province[20170540896] ; Anhui Provincial Key Scientific and Technological Project[1704a0902013]

Chemistry ; Physics

Chemistry, Physical ; Physics, Atomic, Molecular & Chemical

WOS:000571344300049

ROYAL SOC CHEMISTRY

20204309391887

Polarization ; Electric fields ; Nanostructures

Electricity: Basic Concepts and Phenomena:701.1 ; Nanotechnology:761 ; Plasma Physics:932.3 ; Solid State Physics:933

CHEMISTRY

Web of Science

1.Anhui Normal Univ, Dept Phys, Anhui Key Lab Optoelect Mat Sci & Technol, Wuhu 241000, Anhui, Peoples R China
2.Univ Sci & Technol China, Dept Chem Phys, Hefei Natl Lab Phys Sci Microscale, CAS Key Lab Strongly Coupled Quantum Matter Phys, Hefei 230026, Anhui, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China
4.Southern Univ Sci & Technol, Coll Sci, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China

Zhou, Yong,Li, Hongliang,Zhang, Guanhua,et al. Quantitative insights into non-uniform plasmonic hotspots due to symmetry breaking induced by oblique incidence[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2020,22(35):19932-19939.

Zhou, Yong.,Li, Hongliang.,Zhang, Guanhua.,Wei, Dong.,Zhang, Lan.,...&Yang, Xueming.(2020).Quantitative insights into non-uniform plasmonic hotspots due to symmetry breaking induced by oblique incidence.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,22(35),19932-19939.

Zhou, Yong,et al."Quantitative insights into non-uniform plasmonic hotspots due to symmetry breaking induced by oblique incidence".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 22.35(2020):19932-19939.