Direct bandgap emission from strain-doped germanium
Shows how to convert germanium into a *direct-bandgap* emitter through strain-doping — an industry-relevant route to silicon-compatible on-chip light sources. Patent filed (US …
Unified theory of direct or indirect band-gap nature of conventional semiconductors
Unifies the direct- vs. indirect-bandgap character of conventional semiconductors under a single tight-binding like framework — the basis for the later strain-doping prescription …