JOURNAL ARTICLE

Direct-Bandgap Germanium Active Layers Pumped Above Transparency Based on Tensilely Strained Nanomembranes

Abstract

We show that mechanically stressed nanomembranes can be used to introduce sufficient tensile strain in Ge to transform it into a direct-bandgap, efficient light-emitting material that can support population inversion and thus provide optical gain.

Keywords:
Materials science Germanium Optoelectronics Band gap Tensile strain Transparency (behavior) Direct and indirect band gaps Ultimate tensile strength Optics Composite material Silicon Computer science

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Topics

Photonic and Optical Devices
Physical Sciences →  Engineering →  Electrical and Electronic Engineering
Mechanical and Optical Resonators
Physical Sciences →  Physics and Astronomy →  Atomic and Molecular Physics, and Optics
Nanowire Synthesis and Applications
Physical Sciences →  Engineering →  Biomedical Engineering
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