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Emission of direct-gap band in germanium with Ge-GeSn layers on one-dimensional structure.

Abstract：

:In our experiment, it was observed that the emission of direct-gap band in germanium with Ge-GeSn layers on one-dimensional (1D) structure. The results of experiment and calculation demonstrate that the uniaxial tensile strain in the (111) and (110) direction can efficiently transform Ge to a direct bandgap material with the bandgap energy useful for technological application. It is interested that under the tensile strain from Ge-GeSn layers on 1D structure in which the uniaxial strain could be obtained by curved layer (CL) effect, the two bandgaps EΓg and ELg in the (111) direction become nearly equal at 0.83 eV related to the emission of direct-gap band near 1500 nm in the experiments. It is discovered that the red-shift of the peaks from 1500 nm to 1600 nm occurs with change of the uniaxial tensile strain, which proves that the peaks come from the emission of direct-gap band.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Huang ZM,Huang WQ,Liu SR,Dong TG,Wang G,Wu XK,Qin CJ

doi

10.1038/srep24802

subject

Has Abstract

pub_date

2016-04-21 00:00:00

pages

24802

issn

2045-2322

pii

srep24802

journal_volume

6

pub_type

杂志文章

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