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Optical Interface Phonon in Graded Quantum Well Structures |
ZHU Jialin1;DUAN Wenhui2;GU Binglin1 |
1Department of Physics, Tsinghua University, Beijing 100084
2Central Iron and Steel Research Institute, Beijing 100081
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Cite this article: |
ZHU Jialin, DUAN Wenhui, GU Binglin 1994 Chin. Phys. Lett. 11 349-352 |
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Abstract The behaviour of optical interface phonon is investigated first for the graded quantum well of Gal-xAlxAs in the dielectric continuum model. It is found that the behaviour of interface phonon modes is quite different from that in square quantum well structure. The dispersions of the interface modes are sensitive to the gradient of the graded quantum well structure, and the symmetry of modes can be changed greatly, which is important for phonon-related phenomena.
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Keywords:
63.20.Dj
73.40.Lq
68.65.+g
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Published: 01 June 1994
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