Using a forest of gold nanowires to reduce the reflectivity of silicon

被引：9

作者：

Fernandes, Gustavo E. ^{[1
]}

Kim, Jin Ho ^{[1
]}

Liu, Zhijun ^{[1
]}

Shainline, Jeffrey ^{[2
]}

Osgood, Richard, III ^{[3
]}

Xu, Jimmy ^{[1
,2
]}

机构：

[1] Brown Univ, Div Engn, Providence, RI 02912 USA

[2] Brown Univ, Dept Phys, Providence, RI 02912 USA

[3] USA, Natick Soldier Res Dev & Engn Ctr, Natick, MA 01760 USA

来源：

OPTICAL MATERIALS | 2010年 / 32卷 / 05期

关键词：

Metamaterials; Energy harvesting; Silicon photovoltaics; Porous alumina; Anti-reflection coatings; Optical filters; INFRARED-ABSORPTION; FABRICATION; SURFACE; SIZE;

D O I：

10.1016/j.optmat.2009.12.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The optical reflectivity of polished silicon covered by a forest of vertically standing gold nanowires (grown inside the pores of an anodic alumina matrix) is found to be considerably smaller than that of bare polished silicon and strongly influenced by scattering of light by the nanowires. We propose a phenomenological modification to the Maxwell-Garnett effective medium theory formula to account for this effect. We also find that the gold nanowire/alumina film has interesting optical properties, such as transparency in the mid-infrared and high absorbance in the visible, and may be used as a low reflectivity coating and a low-pass filter. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：623 / 626

页数：4

共 19 条

[1]

[Anonymous], 2000, Principles of optics: electromagnetic theory of propagation, interference and diffraction of light

[2] Infrared absorption in bismuth nanowires resulting from quantum confinement [J].