Surface-plasmon-induced light absorption on a rough silver surface

被引：59

作者：

Kim, Sun-Kyung ^{[1
]}

Ee, Ho-Seok ^{[1
]}

Choi, Woonkyung ^{[2
]}

Kwon, Soon-Hong ^{[1
]}

Kang, Ju-Hyung ^{[1
]}

Kim, Yoon-Ho ^{[1
]}

Kwon, Hoki ^{[2
]}

Park, Hong-Gyu ^{[1
]}

机构：

[1] Korea Univ, Dept Phys, Seoul 136701, South Korea

[2] LG Innotek, LED Div, Adv Technol Lab, Seoul 137724, South Korea

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 01期

关键词：

EMITTING-DIODES; SOLAR-CELLS; EXTRACTION; DIFFRACTION; EFFICIENCY; EMITTERS; METALS; DESIGN; ENERGY;

D O I：

10.1063/1.3537812

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3537812]

引用

页数：3

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