Wavelength-dependent optical degradation of green II-VI laser diodes

被引:7
作者
Vogelgesang, R [1 ]
Liang, JJ [1 ]
Wagner, V [1 ]
Lugauer, HJ [1 ]
Geurts, J [1 ]
Waag, A [1 ]
Landwehr, G [1 ]
机构
[1] Univ Wurzburg, Inst Phys, D-97074 Wurzburg, Germany
关键词
D O I
10.1063/1.124690
中图分类号
O59 [应用物理学];
学科分类号
摘要
In this letter we report on optical degradation studies on BeMgZnSe separate confinement quantum well laser structures for the blue-green spectral region. The wavelength of the incident light has been tuned from 3.81 down to 2.10 eV, corresponding to an energy range from above the band gap of the cladding layers down to below the band gap of the quantum well. The dominant degradation mechanism is initiated when electron hole pairs are created in the quantum well. Absorption of light in deep defect bands, e.g., of the p-type cladding material is negligible in these structures. The strain state of the quantum well is one possible driving force for the degradation. In this context, point defect propagation as well as a structural phase transition of the ZnCdSe quantum well are discussed. (C) 1999 American Institute of Physics. [S0003-6951(99)00736-6].
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收藏
页码:1351 / 1353
页数:3
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