Tunneling inhibition for subwavelength light
Tunneling inhibition for subwavelength light
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DOI：
10.1364/ol.38.002846
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发表时间：
2013-08-01
期刊：
影响因子：
3.6
通讯作者：
Torner, Lluis
中科院分区：
文献类型：
--
作者：
Huang, Changming;Shi, Xianling;Torner, Lluis
我们表明，对于特征明显小于光波长的光点，在合适的动态调制波导阵列中可能会发生光隧道抑制。我们发现，对于异相折射率调制的特定频率，相邻波导之间的隧道效应可以被抑制，从而使输入亚波长光点在数百个Rayleigh长度上不失真地传播。调谐抑制原来是有效的，只有当阵列中的波导分离是超过一个临界阈值。列入弱聚焦非线性，以提高本地化。我们分析纯电介质结构中的现象，也在阵列中包含周期性间隔的金属层。(C)2013年美国光学学会
We show that light tunneling inhibition may take place in suitable dynamically modulated waveguide arrays for light spots whose features are remarkably smaller than the wavelength of light. We found that tunneling between neighboring waveguides can be suppressed for specific frequencies of the out-of-phase refractive index modulation, affording undistorted propagation of the input subwavelength light spots over hundreds of Rayleigh lengths. Tunneling inhibition turns out to be effective only when the waveguide separation in the array is above a critical threshold. Inclusion of a weak focusing nonlinearity is shown to improve localization. We analyze the phenomenon in purely dielectric structures and also in arrays containing periodically spaced metallic layers. (C) 2013 Optical Society of America