Narrow gap HgCdTe absorption behavior near the band edge including nonparabolicity and the Urbach tail
Narrow gap HgCdTe absorption behavior near the band edge including nonparabolicity and the Urbach tail
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DOI：
10.1063/1.2245220
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发表时间：
2006-08
影响因子：
4
通讯作者：
Yong Chang;C. Grein;S. Sivananthan;M. Flatté;V. Nathan;S. Guha
中科院分区：
文献类型：
--
作者：
Yong Chang;C. Grein;S. Sivananthan;M. Flatté;V. Nathan;S. Guha
开发了描述 HgCdTe 吸收行为的分析模型，该模型同时考虑了通过 14×14 矩阵 k∙p 方法以及 Urbach 尾计算的非抛物线导带和光孔带的贡献。该模型能够平滑地拟合从 Urbach 尾区到本征吸收区（带隙以上 300meV）的能量范围内的实验吸收系数曲线。与实验结果的比较得到了很好的一致性。
An analytical model describing the absorption behavior of HgCdTe is developed that simultaneously considers the contributions from nonparabolic conduction and light hole bands as calculated by a 14×14 matrix k∙p method as well as the Urbach tail. This model is capable of smoothly fitting experimental absorption coefficient curves over energies ranging from the Urbach tail region to the intrinsic absorption region up to 300meV above the band gap. Comparisons to the experimental results give good agreement.