Role of thermal ejection of carriers in the burning of spatial holes in quantum dot lasers |
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Authors: | L V Asryan R A Suris |
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Affiliation: | (1) A. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia |
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Abstract: | The role of thermal carrier ejection from quantum dots and free carrier diffusion in the burning of spatial holes in semiconductor
quantum dot lasers is analyzed. The balance of the spatially inhomogeneous population inversion in the longitudinal direction
of the cavity is shown to be controlled by thermal ejection from quantum dots. Because of this circumstance, hole burning
in quantum dot lasers can show up more strongly and the threshold for multimode lasing can be lower than in semiconductor
lasers with three-dimensional active regions or quantum-well lasers. The threshold for multimode lasing is determined as a
function of the dispersion in the quantum dot size, cavity length, and temperature for structures that have been optimized
to minimize the threshold current density of the fundamental mode.
Fiz. Tekh. Poluprovodn. 33, 1076–1079 (September 1999) |
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