Muwaffaq Abdullah, Baqer O. Al-Nashy, Amin H. Al-Khursan
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引用次数: 0
Abstract
Gain spectra of undoped and doped quantum dot (QD) structures are studied under the inhomogeneous broadening assumption at four mole fractions . For the QD structure, two peaks appear due to the excited state (ES) and ground state (GS) transitions. The gain for the doped structures doubles the undoped ones. The gain increases while the wavelength is reduced with increasing Cd content due to the broader band discontinuity between the QD states. The discontinuity of the bands for each structure (mole fraction) is calculated, which is one of the merits of this work. While the structure offers the peak wavelengths 470 and 630 nm, other mole fractions offer the wavelengths between them. These visible bands are essential in different applications. The effect of QD size effect is also examined. The wavelength is extended by 20 nm for each 1 nm QD height increment.
C d x Z n 1−x T e / A 1的增益谱在非均匀展宽假设下，研究了四种Cd$ Cd$摩尔分数($({X \;;= \;0.25，\;0.5，\;0.75，\;0.95})$。对于C d 0.25 Z n 0.75 Te$ C{d_{0.25}}Z{n_{0.75}}Te$ QD结构，由于激发态(ES)和基态(GS)跃迁，出现了两个峰。掺杂结构的增益是未掺杂结构的两倍。随着Cd含量的增加，增益增加，而波长减少，这是由于量子点态之间的频带不连续变宽。计算了每个结构(摩尔分数)的能带不连续度，这是本工作的优点之一。而结构C d 0.25 zn 0.75 Te$ C{d_{0.25}}Z{n_{0.75}}Te$的峰值波长为470和630 nm;其他摩尔分数给出了它们之间的波长。这些可见波段在不同的应用中是必不可少的。还考察了量子点尺寸效应的影响。QD高度每增加1 nm，波长延长20 nm。
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