Giant optical activity in quasi-2D planar nanostructures

被引:1
|
作者
Kuwata-Gonokami, Makoto [1 ]
Saito, Nobuyoshi [1 ]
Ino, Yusuke [1 ]
Konishi, Kuniaki [1 ]
Kauranen, Martti B. [2 ]
Jefimovs, Konstantins [3 ]
Vallius, Tuomas [3 ]
Turunen, Jari [3 ]
Svirko, Yuri P. [3 ]
机构
[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan
[2] Tampere Univ Technol, Inst Phys, Tampere, Finland
[3] Univ Joensuu, Dept Phys, Joensuu, Finland
来源
MICROMACHING TECHNOLOGY FOR MICRO-OPTICS AND NANO-OPTICS IV | 2006年 / 6110卷
基金
芬兰科学院;
关键词
planar chirality; subwavelenath gratings; optical activity;
D O I
10.1117/12.644491
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Planar chirality can lead to interesting polarization effects whose interpretation has invoked possible violation of reciprocity and time reversality. We show that a quasi-two-dimensional array consisting of gold nanoparticles with no symmetry plane and having sub-wavelength periodicity and thickness exhibits giant specific rotation (similar to 10(4) degrees/mm) at normal incidence. The rotation is the same for light incident on the front and back sides of the sample. Such reciprocity manifests three-dimensionality of the structure arising from the asymmetry of light-plasmon coupling at the air-metal and substrate-metal interfaces of the structure. The structures thus enable nanoscale polarization control but violate no symmetry principle.
引用
收藏
页数:9
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