| 介质加载表面等离激元的近场光学观测 |
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| 引用本文： | 方哲宇,宋文涛,王辰,齐洪,林峰,朱星.介质加载表面等离激元的近场光学观测[J].电子显微学报,2009,28(2). |
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| 作者姓名： | 方哲宇 宋文涛 王辰 齐洪 林峰 朱星 |
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| 作者单位： | 1. 北京大学物理学院,北京大学人工微结构和介观物理国家重点实验室,北京,100871
2. 北京大学物理学院,北京大学人工微结构和介观物理国家重点实验室,北京,100871;国家纳米中心,北京,100190 |
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| 摘 要： | 利用扫描近场光学显微术(SNOM),观测并分析了基于银膜衬底上CdS纳米带的介质加载表面等离激元(Dielectric-loaded Surface Plasmon Polariton,DLSPP)的激发现象.通过SNOM可以观察到纳米带不同位置的光致荧光光谱峰位有30 meV的红移量.利用Franz-Keldysh效应可以很好地解释能量红移的产生.有限时域差分法的模拟结果进一步验证了实验中观测的现象.这种DLSPP的激发结构,对于光子集成电路及基于等离激元的微纳器件波导有实际意义.
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| 关 键 词： | 近场光学显微术 纳米带 表面等离激元 |
Dielectric-loaded surface plasmon polariton studied by using scanning near-field optical microscopy |
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| FANG Zhe-yu,SONG Wen-tao,WANG Chen,QI Hong,LIN Feng,ZHU Xing.Dielectric-loaded surface plasmon polariton studied by using scanning near-field optical microscopy[J].Journal of Chinese Electron Microscopy Society,2009,28(2). |
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| Authors: | FANG Zhe-yu SONG Wen-tao WANG Chen QI Hong LIN Feng ZHU Xing |
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| Institution: | 1. School of Physics;State Key Lab for Mesoscopic Physics;Peking University;Beijing 100871;2. National Center for Nanoscience and Technology;Beijing 100190;China |
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| Abstract: | We observed the excitation of dielectric-loaded surface plasmon polariton (DLSPP) by a CdS nano-stripe placed on an Ag layer by using scanning near-field optical microscopy (SNOM). A 30 meV spectroscopic red-shift of photoluminescence (PL) was observed at different positions of the stripe by SNOM,which can be explained as the result of Franz-Kelysh effect. The observations of the near-field optical images and spectroscopic data were confirmed by Finite Difference Time Domain (FDTD) calculations. This DLSPP ... |
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| Keywords: | scanning near-field optical microscopy nanostripe surface plasmon polariton |
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