Abstract
Quantum Cascade Lasers (QCLs), first demonstrated by Faist et al.,1 are highly promising optoelectronic devices which offer the potential to produce compact mid-infrared (room-temperature lasing from λ ≈ 4.6–11.5 μm already demonstrated) from conventional wide-bandgap III–V semiconductors.
© 1999 Optical Society of America
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