Linear optical properties of Ge nanocrystals in silica

Annette Dowd; Robert G. Elliman; Barry Luther-Davies

doi:10.1063/1.1409591

Linear optical properties of Ge nanocrystals in silica

Annette Dowd^*, Robert G. Elliman, Barry Luther-Davies

^*Corresponding author for this work

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

9 Citations (Scopus)

Abstract

The absorption and extinction spectra of Ge nanocrystals in silica formed by ion implantation are studied using photothermal deflection and transmission spectroscopies. It is found that scattering makes a significant contribution to the extinction spectrum, damping the spectral features and resulting in a Rayleigh scattering-like ω⁴ dependence. In contrast, the spectra measured by photothermal deflection clearly show features such as the E₁/E₁ + Δ₁ transitions. The Tauc gap is extracted to be ∼0.7 ± 0.1 eV.

Original language	English
Pages (from-to)	2327-2329
Number of pages	3
Journal	Applied Physics Letters
Volume	79
Issue number	15
DOIs	https://doi.org/10.1063/1.1409591
Publication status	Published - 8 Oct 2001

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title = "Linear optical properties of Ge nanocrystals in silica",

abstract = "The absorption and extinction spectra of Ge nanocrystals in silica formed by ion implantation are studied using photothermal deflection and transmission spectroscopies. It is found that scattering makes a significant contribution to the extinction spectrum, damping the spectral features and resulting in a Rayleigh scattering-like ω4 dependence. In contrast, the spectra measured by photothermal deflection clearly show features such as the E1/E1 + Δ1 transitions. The Tauc gap is extracted to be ∼0.7 ± 0.1 eV.",

author = "Annette Dowd and Elliman, {Robert G.} and Barry Luther-Davies",

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N2 - The absorption and extinction spectra of Ge nanocrystals in silica formed by ion implantation are studied using photothermal deflection and transmission spectroscopies. It is found that scattering makes a significant contribution to the extinction spectrum, damping the spectral features and resulting in a Rayleigh scattering-like ω4 dependence. In contrast, the spectra measured by photothermal deflection clearly show features such as the E1/E1 + Δ1 transitions. The Tauc gap is extracted to be ∼0.7 ± 0.1 eV.

AB - The absorption and extinction spectra of Ge nanocrystals in silica formed by ion implantation are studied using photothermal deflection and transmission spectroscopies. It is found that scattering makes a significant contribution to the extinction spectrum, damping the spectral features and resulting in a Rayleigh scattering-like ω4 dependence. In contrast, the spectra measured by photothermal deflection clearly show features such as the E1/E1 + Δ1 transitions. The Tauc gap is extracted to be ∼0.7 ± 0.1 eV.

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U2 - 10.1063/1.1409591

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EP - 2329

JO - Applied Physics Letters

JF - Applied Physics Letters

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Linear optical properties of Ge nanocrystals in silica

Abstract

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