| Complex Modulation in Plasmon-Assisted Transmission Spectra of a Two-Slit Structure |
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| 引用本文： | 李智 张家森 颜海峰 龚旗煌. Complex Modulation in Plasmon-Assisted Transmission Spectra of a Two-Slit Structure[J]. 中国物理快报, 2007, 24(11): 3233-3236 |
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| 作者姓名： | 李智 张家森 颜海峰 龚旗煌 |
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| 作者单位： | Department of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10434020, 10374005, 10521002, and 90501007, the Research Fund for the Doctoral Programme of Higher Education of China under Grant No 20040001012, and the State Key Basic Research Programme of China under Grant No 2007CB307001. |
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| 摘 要： | We study the plasmon-assisted transmission of two kinds of slit structures in a 290-nm-thick silver film on a glass substrate. For the two-slit structure, the total transmission intensity spectra displays a complex modulation, which is attributed to different propagation constants of the surface plasmon polaritons （SPPs） on the silver-air and silver-glass interfaces. Replacing one of the two slits by a shallow corrugation results in a simple sinusoidal intensity modulation because of the only effective SPP excitation and propagation on the silver-air interface. These confirm the role of different SPP propagations and interference in the transmission properties of metal nanoslits.
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| 关 键 词： | 等离子体激光 透射 光学 物理研究 |
| 收稿时间： | 2007-06-14 |
Complex Modulation in Plasmon-Assisted Transmission Spectra of a Two-Slit Structure |
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| LI Zhi,ZHANG Jia-Sen,YAN Hai-Feng,GONG Qi-Huang. Complex Modulation in Plasmon-Assisted Transmission Spectra of a Two-Slit Structure[J]. Chinese Physics Letters, 2007, 24(11): 3233-3236 |
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| Authors: | LI Zhi ZHANG Jia-Sen YAN Hai-Feng GONG Qi-Huang |
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| Affiliation: | Department of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871 |
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| Abstract: | We study the plasmon-assisted transmission of two kinds of slit structures in a 290-nm-thick silver film on a glass substrate. For the two-slit structure, the total transmission intensity spectra displays a complex modulation, which is attributed to different propagation constants of the surface plasmon polaritons (SPPs) on the silver-air and silver-glass interfaces. Replacing one of the two slits by a shallow corrugation results in a simple sinusoidal intensity modulation because of the only effective SPP excitation and propagation on the silver-air interface. These confirm the role of different SPP propagations and interference in the transmission properties of metal nanoslits. |
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| Keywords: | 73.20.Mf 42.79.-e 78.66.Bz |
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