Modeling of optical gain properties of multiple cations InGaAs-InAlAs quantum-well intermixing
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 519-525 |
Journal / Publication | IEEE Journal of Quantum Electronics |
Volume | 34 |
Issue number | 3 |
Publication status | Published - Mar 1998 |
Externally published | Yes |
Link(s)
Abstract
Multiple cations intermixing in an In0.53Ga0.47As-In0.52Al0.48As quantum-well (QW) structure with 60-Å well width is being studied based on the expanded form of Fick's second law. Interdiffusion of the indium sublattice can result in a maximum compressive strain of 0.64% when annealing time reaches 3 h at 812 °C. For a small interdiffuison, i.e., 1-1.5 h, the subband separation between the lowest heavy and light hole states is at its greatest. This has a major contribution to the modified band structure and averaged density of states which can result in an enhanced optical gain up to 40%. This initial stage of intermixing provides the best lasing performance. For large interdiffusion, i.e., up to 6 h, a large blue shift of the peak gain from 0.842 eV (λ = 1.47 μm) to 1.016 eV (λ = 1.22 μm) is obtained, thus giving a high tunability of the lasing wavelength.
Research Area(s)
- Diffusion process, InAlGaAs, Optical gain, Quantum-well interdiffusion, Quantum-well intermixing, Quantum-well lasers, Tunable devices
Citation Format(s)
Modeling of optical gain properties of multiple cations InGaAs-InAlAs quantum-well intermixing. / Chan, Michael C.Y.; Chan, Y.; Li, E. Herbert.
In: IEEE Journal of Quantum Electronics, Vol. 34, No. 3, 03.1998, p. 519-525.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review