SiGeSn growth studies using reduced pressure chemical vapor deposition towards optoelectronic applications

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WIRTHS, S., BUCA, D., IKONIC, Z., HARRISON, Paul, TIEDEMANN, A. T., HOLLÄNDER, B., STOICA, T., MUSSLER, G., BREUER, U., HARTMANN, J. M., GRÜTZMACHER, D. and MANTL, S. (2014). SiGeSn growth studies using reduced pressure chemical vapor deposition towards optoelectronic applications. Thin Solid Films, 557, 183-187. [Article]

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8422:18355

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8422:18355

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Abstract

In this contribution, we propose a laser concept based on a double heterostructure consisting of tensile strained Ge as the active medium and SiGeSn ternaries as cladding layers. Electronic band-structure calculations were used to determine the Si and Sn concentrations yielding a type I heterostructure with appropriate band-offsets (50meV) between strained Ge and SiGeSn. Reduced pressure chemical vapor deposition system was employed to study the laser structure growth. Detailed analyses regarding layer composition, crystal quality, surface morphology and elastic strain are presented. A strong temperature dependence of the Si and Sn incorporation has been obtained, ranging from 4 to 19 at.% Si and from 4 to 12 at.% Sn (growth temperatures between 350 °C and 475°C). The high single crystalline quality and lowsurface roughness of 0.5–0.75nmdemonstrate that our layers are suitable for heterostructure laser fabrication.

More Information

Research Institute, Centre or Group - Does NOT include content added after October 2018:

Materials and Engineering Research Institute > Advanced Coatings and Composites Research Centre > Electronic Materials and Sensors Research Group

Page Range:

183-187

Identifiers

Identification Number:

10.1016/j.tsf.2013.10.078

ORCID for Paul Harrison: