Surface plasmons in terahertz metamaterials

被引:47
作者
Acuna, G. [1 ,2 ]
Heucke, S. F. [1 ,2 ]
Kuchler, F. [1 ,2 ]
Chen, H. -T. [3 ]
Taylor, A. J. [3 ]
Kersting, R. [1 ,2 ]
机构
[1] Univ Munich, Photon & Optoelect Grp, D-80799 Munich, Germany
[2] Univ Munich, Ctr NanoSci, D-80799 Munich, Germany
[3] Los Alamos Natl Lab, MPA CINT, Los Alamos, NM 87545 USA
关键词
Metamaterials;
D O I
10.1364/OE.16.018745
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We characterize terahertz metamaterials by applying apertureless near-field microscopy with a bandwidth that covers the entire spectral response of the structures. The observations agree with the interpretation of the fundamental mode of the metamaterial. But the high frequency resonance shows properties that deviate from the common interpretation. We show that the high frequency response is governed by surface plasmon excitations, which have a comparable oscillator strength as the fundamental mode. (c) 2008 Optical Society of America
引用
收藏
页码:18745 / 18751
页数:7
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