Germanium Nanorod Extinction Spectra: Discrete Dipole Approximation Calculations and Experiment

被引：8

作者：

Chockla, Aaron M. ^{[1
]}

Holmberg, Vincent C. ^{[1
]}

Korgel, Brian A. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Chem Engn, Texas Mat Inst, Ctr Nano & Mol Sci & Technol, Austin, TX 78712 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 42期

基金：

美国国家科学基金会;

关键词：

SOLAR-CELLS; PHOTOVOLTAIC APPLICATIONS; NANOWIRE MATERIALS; OPTICAL-PROPERTIES; LIGHT-SCATTERING; PHOTOLUMINESCENCE; NANOCRYSTALS; INTEGRATION; ABSORPTION; PARTICLES;

D O I：

10.1021/jp3080207

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Optical extinction spectra were measured for dispersions of germanium (Ge) nanorools produced by arrested solution-liquid-solid (SLS) growth using bismuth (Bi) seeds. Peaks in the real (n) and imaginary (k) parts of the complex index of refraction of Ge give rise to an absorbance peak at similar to 600 nm, which shifts to slightly longer wavelengths with increased aspect ratio. Discrete dipole approximation calculations of absorption and scattering cross sections reveal that the length-dependent optical properties result from enhanced light trapping and absorption.

引用

页码：22625 / 22630

页数：6

共 42 条

[1] Scanning photocurrent imaging and electronic band studies in silicon nanowire field effect transistors [J].