Linear optical properties of Ge nanocrystals in silica | Zendy

Annette Dowd | Zendy; R. G. Elliman | Zendy; Barry LutherDavies | Zendy

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Linear optical properties of Ge nanocrystals in silica

Author(s) -

Annette Dowd,

R. G. Elliman,

Barry LutherDavies

Publication year - 2001

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1409591

Subject(s) - rayleigh scattering , materials science , scattering , photothermal therapy , spectral line , photothermal spectroscopy , nanocrystal , extinction (optical mineralogy) , absorption spectroscopy , molecular physics , optics , analytical chemistry (journal) , chemistry , nanotechnology , physics , chromatography , astronomy

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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