Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8149117 | Journal of Crystal Growth | 2017 | 10 Pages |
Abstract
We have demonstrated that in situ annealing effect has to be taken into account in order to realize the 1.31â¯Î¼m InAs quantum dot (QD) lasers with the dot-in-well (DWELL) structure. The photoluminescence (PL) properties have been investigated for the InAs DWELL samples annealed at different temperatures in situ, simulating the annealing process during the growth of the top cladding AlGaAs layer in the laser structure. The QDs with large size in the DWELL structure are vulnerable to the annealing process at temperatures above 550â¯Â°C, revealed by the drastic change in the PL spectra. However, the DWELL structure is stable during the annealing process at 540â¯Â°C for three hours. The thermal stability of the QDs in the DWELL structure has to be considered in the growth of QD lasers for long wavelength operation.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Xuyi Zhao, Peng Wang, Chunfang Cao, Jinyi Yan, Fangxing Zha, Hailong Wang, Qian Gong,