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Some Considerations on Energy Levels of Quantum Cascade Lasers |
| YANG Quan-kui;LI Ai-zhen |
| State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Metallurgy, Chinese Academy of Sciences, Shanghai 200050 |
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| Cite this article: |
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YANG Quan-kui, LI Ai-zhen 1999 Chin. Phys. Lett. 16 443-445 |
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Abstract Conduction band non-parabolicity is taken into account and a numerical method is proposed to calculate the electron subband energy levels and corresponding wave functions in the active region of quantum cascade lasers. For a coupled double-well vertical transition mode active region, the calculated ΔE21 = 32 meV, ΔE32 = 270 meV correspond, respectively, to the energy of an optical phonon and that of a photon at wavelength λ = 4.5μm. For a coupled triple-well vertical transition active region, the calculated ΔE21 = 32.4meV, ΔE32= 250meV correspond to the energy of an optical phonon and the photon energy at wavelength λ= 5.0 μm.
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| Keywords:
73.20.Dx
71.10.+x
78.30.Fs
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Published: 01 June 1999
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