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Title:
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Stimulated emission induced by exciton–exciton scattering in ZnO/ZnMgO multiquantum wells up to room temperature.
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Author:
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Sun, Handong.; Makino, T.; Tuan, N. T.; Segawa, Y.; Tang, Z. K.; Wong, G. K. L.; Kawasaki, M.; Ohtomo, A.; Tamura, K.; Koinuma, H.
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Copyright year:
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2000 |
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Abstract:
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The mechanism of ultraviolet stimulated emission was investigated in ZnO/ZnMgO multiquantum wells. Stimulated emission induced by exciton–exciton scattering occurred throughout a range of temperatures from 5 K to room temperature. At temperatures higher than 160 K, stimulated emission due to electron-hole plasma recombination was also observed with a higher excitation threshold than that of exciton–exciton scattering. The exciton binding energies of multiquantum wells were larger than that of bulk ZnO and increased with a decrease in the well widths. This enhancement of exciton binding energy is due to the quantum-confinement effect and is favorable for the stability of exciton states. |
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Subject:
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DRNTU::Science::Physics. |
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Type:
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Journal Article |
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Series/ Journal Title:
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Applied Physics Letters. |
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School:
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School of Physical and Mathematical Sciences |
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Rights:
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Applied Physics Letters © copyright 2000 American Institute of Physics. The journal's website is located at http://apl.aip.org/. |
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Version:
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Published version |
