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- Title
The use of spatially ordered arrays of etched holes for fabrication of single-mode vertical-cavity surface-emitting lasers based on submonolayer InGaAs quantum dots.
- Authors
Kuzmenkov, A. G.; Blokhin, S. A.; Maleev, N. A.; Sakharov, A. V.; Tikhomirov, V. G.; Maksimov, M. V.; Ustinov, V. M.; Kovsh, A. R.; Mikhrin, S. S.; Ledentsov, N. N.; Yang, H. P. D.; Lin, G.; Hsiao, R. S.; Chi, J. Y.
- Abstract
To suppress the generation of high-order modes in vertical-cavity surface-emitting lasers based on submonolayer InGaAs quantum dots, the method of formation of a spatially ordered array of etched holes in the upper distributed Bragg reflector was used. Single-mode vertical-cavity surface-emitting lasers for spectral region of 990 nm with current-aperture diameter of 20 μm, threshold current 0.9 mA, and maximum output power 3.8 mW at room temperature were demonstrated. Single-mode lasing with the coefficient of side-mode suppression in excess of 35 dB is retained in the entire range of pump currents. A decrease in the current oxide aperture to sizes that are close to those of the optical aperture brings about an increase in the external quantum efficiency; however, in this case, the transition to the multimode of lasing is observed at high pump currents.
- Subjects
QUANTUM dots; QUANTUM electronics; SINGLE-mode optical fibers; OPTOELECTRONIC devices; ORTHOGONAL arrays
- Publication
Semiconductors, 2007, Vol 41, Issue 10, p1224
- ISSN
1063-7826
- Publication type
Article
- DOI
10.1134/S1063782607100181