Room temperature lasing from InGaAs quantum dots
- 1 January 1996
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 32 (18), 1732-1734
- https://doi.org/10.1049/el:19961147
Abstract
Alternating molecular beam epitaxy is used to form InGaAs quantum dots by utilising the two-dimensional to three-dimensional Stranski-Krastanow growth transition. The quantum dots are embedded in a separate confinement heterostructure to form laser diodes. Lasing is observed from excited states in the quantum dots from room temperature down to 80 K. Pronounced state-filling is observed in the quantum dot lasers at room temperature. As the temperature is decreased, the state-filling becomes less pronounced, which compensates for the bandgap increase and leads to lasers whose lasing wavelength is very weakly dependent on temperature.Keywords
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