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Energy Band and Absorption Coefficient of Quantum Dots in a Well Structure

100%

Zhang P., Lu X., Zhang C., Yao J.

Acta Physica Polonica A

2012

vol. 122

issue 1

197-201

Building on the effective-mass envelope function theory, this paper focuses on the study of the energy band and the absorption coefficient of InAs/In_{x}Ga_{1 - x}As quantum dots in a well (DWELL) structure. In contrast to InAs/In_{0.15}Ga_{0.85}As quantum DWELL, the InAs/In_{0.2}Ga_{0.8}As quantum DWELL has lower ground states. With the thickness of In_{0.15}Ga_{0.85}As layer changing from 7 nm to 9 nm and In_{0.2}Ga_{0.8}As layer changing from 9 nm to 12 nm, the calculation shows that their absorption coefficient spectra takes a red shift in the long-wave infrared and far-infrared ranges, respectively. Moreover, when the thickness of the In_{x}Ga_{1 - x}As layer is defined as 9 nm, the absorption coefficient spectra of InAs/In_{0.2}Ga_{0.8}As DWELL shows a obvious red shift comparing with that of InAs/In_{0.15}Ga_{0.85}As DWELL.

MAGNETOHYDRODYNAMIC CALCULATION ON DOUBLE-LOOP CHANNEL INDUCTION TUNDISH

100%

Zhang C., Yue Q., Wang X., Pei X.

Archives of Metallurgy and Materials

2018

vol. 63

issue 1

Shrinkage Porosity Criterion and Its Application to A 5.5 Ton Steel Ingot

100%

Zhang C., Zhang L., Bao Y., Wang M.

Archives of Foundry Engineering

2016

issue 2

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Search results

Energy Band and Absorption Coefficient of Quantum Dots in a Well Structure

MAGNETOHYDRODYNAMIC CALCULATION ON DOUBLE-LOOP CHANNEL INDUCTION TUNDISH

Shrinkage Porosity Criterion and Its Application to A 5.5 Ton Steel Ingot