Surface-plasmon-induced light absorption on a rough silver surface
Surface-plasmon-induced light absorption on a rough silver surface
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DOI：
10.1063/1.3537812
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发表时间：
2011-01
影响因子：
4
通讯作者：
Sun-Kyung Kim;H. Ee;W. Choi;Soon-Hong Kwon;Ju-hyung Kang;Yoon-Ho Kim;Hoki Kwon;Hong-Gyu Park
中科院分区：
文献类型：
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作者：
Sun-Kyung Kim;H. Ee;W. Choi;Soon-Hong Kwon;Ju-hyung Kang;Yoon-Ho Kim;Hoki Kwon;Hong-Gyu Park
我们研究了不同表面粗糙度的金属薄膜，银和铝的光吸收。用积分球测量表明，随着表面粗糙度的增加，银的反射率显著降低，而铝的反射率几乎不变。实验结果与数值模拟结果吻合较好，较好地描述了金属表面粗糙度。特别是，模拟结果表明，在粗糙的银表面上激发的表面等离子体极化子的吸收引起银的表面依赖反射率。本研究为高效发光二极管和光伏的金属背面反射器的合理设计提供了一种方便可行的规则。
We investigate light absorption in metal films, silver and aluminum, with different surface roughness. Measurements using an integrating sphere show that the reflectance in silver decreases significantly with increasing surface roughness whereas the reflectance in aluminum is almost constant. The experimental results agree well with numerical simulations in which the surface roughness of metal is described properly. In particular, the simulations demonstrate that the absorption by surface-plasmon-polaritons excited on a rough silver surface causes the surface-dependent reflectance in silver. This study suggests a convenient and feasible rule to rationally design a backside metal reflector toward high-efficiency light-emitting diodes and photovoltaics.