Blue light absorption enhancement based on vertically channelling modes in nano-holes arrays
Blue light absorption enhancement based on vertically channelling modes in nano-holes arrays
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DOI：
10.1063/1.4864267
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发表时间：
2014-02-03
影响因子：
4
通讯作者：
Seassal, Christian
中科院分区：
文献类型：
--
作者：
Gomard, Guillaume;Peretti, Romain;Seassal, Christian
我们调查的特定光学制度发生在短波长，在高吸收制度，在硅薄膜图案周期性排列的纳米孔。近场扫描光学显微镜表明，入射光耦合到垂直沟道模式。光学建模和模拟表明，在低折射率区域内行进的光在纳米孔侧壁的直接附近被吸收。在光电子器件的光管理中，应该考虑这种沟道机制。(C)2014 AIP Publishing LLC.
We investigate the specific optical regime occurring at short wavelengths, in the high absorption regime, in silicon thin-films patterned by periodically arranged nano-holes. Near-field scanning optical microscopy indicates that the incoming light is coupled to vertically channelling modes. Optical modelling and simulations show that the light, travelling inside the low-index regions, is absorbed at the direct vicinity of the nano-holes sidewalls. This channelling regime should be taken into account for light management in optoelectronic devices. (C) 2014 AIP Publishing LLC.