Plasmon dispersion diagram and localization effects in a three-cavity commensurate grating

被引：8
作者：
Barbara, A. [1 ,2 ]
Collin, S. [3 ]
Sauvan, Ch. [3 ]
Le Perchec, J. [1 ,2 ]
Maxime, C. [1 ,2 ]
Pelouard, J-L. [1 ,2 ]
Quemerais, P. [1 ,2 ]
机构：
[1] CNRS, Inst Neel, F-38042 Grenoble 9, France
[2] Univ Grenoble 1, F-38042 Grenoble 9, France
[3] Route Nozay, CNRS, Lab Photon & Nanostruct, F-91460 Marcoussis, France
来源：
OPTICS EXPRESS | 2010年 / 18卷 / 14期
关键词：
METALLIC GRATINGS; QUASI-CRYSTALS; TRANSMISSION RESONANCES; ELECTRONIC-PROPERTIES; EXCITATIONS; GROWTH; FILMS; LIGHT;
D O I：
10.1364/OE.18.014913
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Commensurate gratings of deep-metallic grooves have highly localized cavity resonances which do not exist for purely periodic gratings. In this paper we present the experimental dispersion diagram of the resonances of a commensurate grating with three sub-wavelength cavities per period. We observe selective light localization within the cavities, transition from a localized to a delocalized mode and modifications of the coupling of modes with the external plane-wave that may lead to the generation of black modes. This unexpected complexity is analyzed via a theoretical study in full agreement with the experiments. These results open a way to the control of wavelength-dependent hot spot predicted in more complex commensurate gratings. (C) 2010 Optical Society of America
引用
收藏
页码：14913 / 14925
页数：13
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