Title :
Direct-bandgap emission from hydrostatically tensile-strained Germanium nanocrystals
Author :
Nataraj, L. ; Xu, F. ; Cloutier, S.G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Delaware, Newark, DE, USA
Abstract :
We report on the high room-temperature luminescence from Germanium nanocrystals synthesized by mechanical grinding. Transients and optical spectroscopy measurements are consistent with HRTEM and electron diffraction, suggesting high tensile strains favoring direct band-to-band transitions.
Keywords :
electron diffraction; elemental semiconductors; energy gap; germanium; grinding; luminescence; nanostructured materials; transmission electron microscopy; Ge; HRTEM; direct band-to-band transitions; direct-bandgap emission; electron diffraction; hydrostatically tensile-strained germanium nanocrystals; luminescence; mechanical grinding; optical spectroscopy measurements; temperature 293 K to 298 K; Germanium; Nanocrystals; Optical diffraction; Optical variables measurement; Photoluminescence; Silicon; Tensile strain;
Conference_Titel :
Group IV Photonics (GFP), 2010 7th IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-6344-2
DOI :
10.1109/GROUP4.2010.5643428
