Groove-gratings to optimize the electric field enhancement in a plasmonic nanoslit-cavity

被引：14
作者：
Chen, Chang [1 ,2 ]
Verellen, Niels [1 ,3 ,4 ]
Lodewijks, Kristof [1 ,4 ]
Lagae, Liesbet [1 ,5 ]
Maes, Guido [2 ]
Borghs, Gustaaf [1 ,5 ]
Van Dorpe, Pol [1 ,4 ]
机构：
[1] IMEC VZW, B-3001 Louvain, Belgium
[2] Katholieke Univ Leuven, Dept Chem, B-3001 Louvain, Belgium
[3] Katholieke Univ Leuven, Inst Nanoscale Phys & Chem, B-3001 Louvain, Belgium
[4] Katholieke Univ Leuven, ESAT, B-3001 Louvain, Belgium
[5] Katholieke Univ Leuven, Dept Phys & Astron, B-3001 Louvain, Belgium
来源：
JOURNAL OF APPLIED PHYSICS | 2010年 / 108卷 / 03期
关键词：
RAMAN-SCATTERING; WAVE-GUIDES; SPECTROSCOPY; LIGHT;
D O I：
10.1063/1.3457017
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study the spectral properties of a triangular plasmonic nanoslit-cavity with periodic triangular grooves to optimize the field enhancement inside the nanoslit. This work is mainly based on numerical calculations and also partly supported by experimental evidence. In the nanoslit-cavity, we can distinguish following three main contributions to the field enhancement: electrostatic interaction in the nanoslit, surface plasmon polariton standing waves in the cavity and excitation, and reflection of surface plasmon polaritons by the grating. The importance of phase matching between surface plasmons generated at the nanoslit and the gratings is also investigated in order to optimize the local field intensity in the nanoslit. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3457017]
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页数：8
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