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 Direct and indirect band gaps Transparency (behavior) Strain engineering Population inversion Ultimate tensile strength Optics Silicon Composite material Laser Computer science
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Topics
Photonic and Optical Devices
Physical Sciences → Engineering → Electrical and Electronic Engineering
Nanowire Synthesis and Applications
Physical Sciences → Engineering → Biomedical Engineering
Mechanical and Optical Resonators
Physical Sciences → Physics and Astronomy → Atomic and Molecular Physics, and Optics
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