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Strong Coupling of a Meta-Diatom to a Plasmonic Nanocavity

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【Author】 CHEN San;LU Hong-Yan;LIU Jian-Qiang;ZHU Yong-Yuan;School of Physics and Electronic Information,Huaibei Normal University;School of Science,Jiujiang University;National Laboratory of Solid State Microstructures,and Department of Physics,Nanjing University;

【机构】 School of Physics and Electronic Information,Huaibei Normal University； School of Science,Jiujiang University； National Laboratory of Solid State Microstructures,and Department of Physics,Nanjing University；

【摘要】 A strong coupling meta-diatom-plasmonic nanocavity is proposed and numerically investigated.When the znetadiatomic sizes are gradually increased,the meta-diatomic electric dipole and quadrupole resonances could strongly couple to those of the nanocavity.The characteristic anticrossing behaviors of three hybrid modes manifest the occurrence of the strong coupling from the transmission spectra,with Rabi-type splittings at about 40.8 meV and128.4meV for dipole interaction,and 11.8meV and 72.7meV for quadrupole interaction,respectively.We also present the coupling strength dependence on meta-atomic positions,in which one meta-atomic position is fixed and the other is changed.The average Rabi-type sph’ttings of three poJariton modes are used to evaluate the coupling strength of the meta-atomic position dependence.The corresponding Rabi-type oscillation in the time domain is also presented,which is obviously different from the one of a single meta-atom strongly coupling to a nanocavity.更多还原

【Abstract】 A strong coupling meta-diatom-plasmonic nanocavity is proposed and numerically investigated.When the znetadiatomic sizes are gradually increased,the meta-diatomic electric dipole and quadrupole resonances could strongly couple to those of the nanocavity.The characteristic anticrossing behaviors of three hybrid modes manifest the occurrence of the strong coupling from the transmission spectra,with Rabi-type splittings at about 40.8 meV and128.4meV for dipole interaction,and 11.8meV and 72.7meV for quadrupole interaction,respectively.We also present the coupling strength dependence on meta-atomic positions,in which one meta-atomic position is fixed and the other is changed.The average Rabi-type sph’ttings of three poJariton modes are used to evaluate the coupling strength of the meta-atomic position dependence.The corresponding Rabi-type oscillation in the time domain is also presented,which is obviously different from the one of a single meta-atom strongly coupling to a nanocavity.更多还原

【基金】 Supported by the National Basic Research Program of China under Grant No 2010CB630703;the National Natural Science Foundation of China under Grant Nos 60806015 and 11104099;the Natural Science Foundation of Educational Commission of Anhui Province(KJ2012A252)

【文献出处】 Chinese Physics Letters ,中国物理快报(英文版) , 编辑部邮箱 ,2013年08期

【分类号】O488

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