Abstract
Focus of this work is the optimization of growth to achieve high quality laser material for emission at 1.3 μm and beyond. GaAs/GaAsN/InGaAsN heterostructures were grown by solid source molecular beam epitaxy. To achieve optimum crystal quality of InGaAsN heterostructures, growth was followed by a high temperature treatment at about 700°C. The high optical quality of our annealed material is attested by large exciton recombination lifetimes (more than 2 ns). Consequently, a decrease of single quantum well transparency current density down to 100 A/cm2 is found and SWQ lasers with threshold current densities as low as 350 A/cm2 have been made. This represents clearly the lowest laser thresholds reported so far for emission around 1.3 μm from the InGaAsN material system.
Original language | English |
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Pages (from-to) | 545-552 |
Number of pages | 8 |
Journal | Journal of Crystal Growth |
Volume | 227-228 |
DOIs | |
State | Published - Jul 2001 |
Event | 11th International Conference on Molecular Beam Epitaxy - Bijing, China Duration: 11 Sep 2000 → 15 Sep 2000 |
Keywords
- B1. Nitrides
- B2. Semiconducting gallium arsenide
- B3. Laser diodes