Extrinsic Effects of Indirect Radiative Transition of Ge

The effects of surface roughness and defects on Ge indirect radiative transition was observed. The oxide roughness scattering can conserve the momentum during electron-hole recombination and enhance the indirect radiative transition. The indirect transition is affected more sensitively by the non-ra...

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Main Authors: Jan, Sun-Rong, Lee, Cheng-Han, Cheng, Tzu-Huan, Chen, Yen-Yu, Peng, K.-L., Chan, S. T., Liu, C. W., Yamamoto, Yuji, Tillack, Bernd
Format: Conference Proceeding
Language:English
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Summary:The effects of surface roughness and defects on Ge indirect radiative transition was observed. The oxide roughness scattering can conserve the momentum during electron-hole recombination and enhance the indirect radiative transition. The indirect transition is affected more sensitively by the non-radiative transition resulting from defects in Ge. The passivation of GeO2 on Ge also decreases the surface defect density and leads to intensity enhancement of photoluminescence.
ISSN:1938-5862
1938-6737
DOI:10.1149/1.3487586