| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Strong Coupling between Propagating and Localized Surface Plasmons in Plasmonic Cavities |
| LI Ming-Zhu, AN Zheng-Hua**, ZHOU Lei, MAO Fei-Long, WANG Heng-Liang
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Institute of Advanced Materials and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433
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LI Ming-Zhu, AN Zheng-Hua, ZHOU Lei et al 2011 Chin. Phys. Lett. 28 075206 |
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Abstract Au/GaAs/Au plasmonic cavities with a periodic hole array perforated in the top Au layer are studied. Propagating surface plasmons (PSPs) and localized surface plasmons (LSPs) associated with the rectangle hole shapes are found to interact and highly hybridize in the cavity structure, which eventually determines the resonance properties of the cavities. An anticrossing of resonance frequencies in the reflection spectra is observed when the frequency of PSPs approaches that of LSPs, demonstrating the strong coupling between SPPs and LSPs in the tri-layer plasmonic cavities. This work may provide hints to the plasmonic cavity design for light-harvesting optoelectronic applications.
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| Keywords:
52.65.-y
73.20.Mf
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Received: 01 April 2011
Published: 29 June 2011
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| PACS: |
52.65.-y
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(Plasma simulation)
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73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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