Room Temperature Lasing of Multi-Stage Quantum-Cascade Lasers at 8 μm Wavelength
- Resource Type
- Authors
- Innokenty I. Novikov; Grigorii S. Sokolovskii; L. Ya. Karachinsky; A. V. Babichev; A. G. Gladyshev; A. S. Kurochkin; E. S. Kolodeznyi; Adel Bousseksou; A. Yu. Egorov; Vladislav E. Bougrov
- Source
- Semiconductors. 52:1082-1085
- Subject
- Materials science
Alloy
Physics::Optics
02 engineering and technology
engineering.material
Epitaxy
01 natural sciences
law.invention
Condensed Matter::Materials Science
law
0103 physical sciences
010302 applied physics
business.industry
Heterojunction
021001 nanoscience & nanotechnology
Condensed Matter Physics
Cladding (fiber optics)
Laser
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Wavelength
Cascade
engineering
Optoelectronics
0210 nano-technology
business
Lasing threshold
- Language
- ISSN
- 1090-6479
1063-7826
Room-temperature lasing at a wavelength of 8 μm in multistage quantum-cascade lasers pumped by current pulses is demonstrated. A quantum-cascade laser heterostructure based on the In0.53Ga0.47As/Al0.48In0.52As alloy heteropair, matched to an InP substrate, is grown by molecular-beam epitaxy and consists of 50 identical cascades placed in a waveguide with air as the top cladding. A threshold current density of ~5.1 kA/cm2 at a temperature of 300 K is obtained in ridge lasers with a cavity length of 1.4 mm and a ridge width of 24 μm.