U-shaped switches for optical information processing at the nanoscale.
U-shaped switches for optical information processing at the nanoscale.
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DOI：
10.1002/smll.201100752
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发表时间：
2011-09
期刊：
影响因子：
13.3
通讯作者：
V. Valev;A. Silhanek;B. De Clercq;W. Gillijns;Y. Jeyaram;Xuezhi Zheng;V. Volskiy;O. Aktsipetrov;G. Vandenbosch;M. Ameloot;V. Moshchalkov;T. Verbiest
中科院分区：
文献类型：
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作者：
V. Valev;A. Silhanek;B. De Clercq;W. Gillijns;Y. Jeyaram;Xuezhi Zheng;V. Volskiy;O. Aktsipetrov;G. Vandenbosch;M. Ameloot;V. Moshchalkov;T. Verbiest
在这种装置中，将使用光波而不是电子。这种可能性源于这样一个事实，即光波可以耦合到金属纳米结构表面电子的集体激发，这种特性被称为表面等离子体共振。由于这些光诱导共振发生在纳米结构的表面和界面，因此可以很容易地用表面和界面特定的fic光学技术来研究它们，例如二次谐波产生(SHG)。倍频是一种非线性光学技术，在偶极近似下，在具有对称中心的材料中是被禁止的。因此，倍频对表面(或界面)等对称性破缺区域具有很高的敏感性，并已成功地应用于不同几何形状的等离子体纳米材料的研究。
4–6 ] In such devices, light waves would be used instead of electrons. The possibility arises from the fact that light waves can couple to collective excitations of electrons at the surfaces of metallic nanostructures, a prop-erty referred to as surface plasmon resonance. Because these optically induced resonances occur at the surfaces and interfaces of the nanostructures, they can readily be investigated with a surface- and interface-specifi c optical technique, such as second-harmonic generation (SHG). SHG is a nonlinear optical technique that, within the dipole approximation, is forbidden in materials with a center of symmetry. Consequently, SHG is highly sensitive to regions with broken symmetry, such as surfaces (or interfaces), and it has been successfully applied to the study of plasmonic nano-materials with different geometries.