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

Sun Kyung Kim; Ho Seok Ee; Woonkyung Choi; Soon Hong Kwon; Ju Hyung Kang; Yoon Ho Kim; Hoki Kwon; Hong Gyu Park

doi:10.1063/1.3537812

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

Sun Kyung Kim, Ho Seok Ee, Woonkyung Choi, Soon Hong Kwon, Ju Hyung Kang, Yoon Ho Kim, Hoki Kwon, Hong Gyu Park

Department of Physics

Research output: Contribution to journal › Article › peer-review

74 Citations (Scopus)

Abstract

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.

Original language	English
Article number	011109
Journal	Applied Physics Letters
Volume	98
Issue number	1
DOIs	https://doi.org/10.1063/1.3537812
Publication status	Published - 2011 Jan 3

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3537812

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title = "Surface-plasmon-induced light absorption on a rough silver surface",

abstract = "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.",

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note = "Funding Information: This work was supported by Creative Research Initiatives (Grant No. 2009-0081565) of MEST/KOSEF. S.-K.K. and H.-S.E. contributed equally to this work. ",

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AU - Kim, Sun Kyung

AU - Ee, Ho Seok

AU - Choi, Woonkyung

AU - Kwon, Soon Hong

AU - Kang, Ju Hyung

AU - Kim, Yoon Ho

AU - Kwon, Hoki

AU - Park, Hong Gyu

N1 - Funding Information: This work was supported by Creative Research Initiatives (Grant No. 2009-0081565) of MEST/KOSEF. S.-K.K. and H.-S.E. contributed equally to this work.

PY - 2011/1/3

Y1 - 2011/1/3

N2 - 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.

AB - 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.

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

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