DETAILED CHARACTERIZATION OF HGCDTE/CDTE MULTIPLE QUANTUM WELLS

被引：19
作者：
CESAR, CL
ISLAM, MN
FELDMAN, RD
AUSTIN, RF
CHEMLA, DS
WEST, LC
DIGIOVANNI, AE
机构：
来源：
APPLIED PHYSICS LETTERS | 1990年 / 56卷 / 03期
关键词：
D O I：
10.1063/1.102809
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present absorption measurements in HgCdTe/CdTe multiple quantum wells as a function of temperature, polarization, and well size in the 3-4 μm wavelength region. The energy levels are calculated using a model that includes band nonparabolicity. The spectra are fitted to a sum of continuous broadened steps including the two-dimensional Sommerfeld enhancement factor. Polarization measurements confirm the assignment of heavy and light holes. The ratio between heavy and light hole absorption of 2.3/1 agrees well with theory. The fit of the linewidth with temperature shows a homogeneous linewidth of 4.6 meV times the density of longitudinal optical phonons and an inhomogeneous linewidth of 6.4 meV, which is similar to the alloy broadening in the bulk material.
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页码：283 / 285
页数：3
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