Germanium nanorod extinction spectra: Discrete dipole approximation calculations and experiment

Aaron Michael Chockla; Vincent C. Holmberg; Brian A. Korgel

doi:10.1021/jp3080207

Germanium nanorod extinction spectra: Discrete dipole approximation calculations and experiment

Aaron Michael Chockla, Vincent C. Holmberg, Brian A. Korgel^*

^*Corresponding author for this work

Entrepreneurship (ENTR)

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8 Scopus citations

Abstract

Optical extinction spectra were measured for dispersions of germanium (Ge) nanorods 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 ∼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.

Original language	English (US)
Pages (from-to)	22625-22630
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	116
Issue number	42
DOIs	https://doi.org/10.1021/jp3080207
State	Published - Oct 25 2012

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/jp3080207

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abstract = "Optical extinction spectra were measured for dispersions of germanium (Ge) nanorods 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 ∼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.",

author = "Chockla, {Aaron Michael} and Holmberg, {Vincent C.} and Korgel, {Brian A.}",

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T1 - Germanium nanorod extinction spectra

T2 - Discrete dipole approximation calculations and experiment

AU - Chockla, Aaron Michael

AU - Holmberg, Vincent C.

AU - Korgel, Brian A.

PY - 2012/10/25

Y1 - 2012/10/25

N2 - Optical extinction spectra were measured for dispersions of germanium (Ge) nanorods 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 ∼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.

AB - Optical extinction spectra were measured for dispersions of germanium (Ge) nanorods 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 ∼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.

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Germanium nanorod extinction spectra: Discrete dipole approximation calculations and experiment

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