Optical Properties of Strained CdTe/ZnTe Pyramidal Quantum Dots
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概要
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Optical properties of strained CdTe/ZnTe pyramidal quantum dots (QDs) were investigated using an eight-band strain-dependent $k\cdot p$ Hamiltonian. The transition energy gradually decreases from 2.20 to 1.89 eV when the length of the base ($a=h$) changes from 60 to 120 Å. The quasi-Fermi-level separation in the conduction band is found to be much larger than that in the valence band. The optical gain for the $z$-polarization is shown to be larger than that for the $x$-polarization and its peak wavelength on the long wavelength side is 0.632 μm for a QD with $a=h=100$. Also, we know that the transparency carrier density for the $z$-polarization is smaller than that for the $x$-polarization.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2010-01-25
著者
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Park Seoung-hwan
Department Of Electronic Engineering Catholic University Of Daegu
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Park Seoung-Hwan
Department of Electronics Engineering, Catholic University of Daegu, Hayang, Kyeongbuk 712-702, Republic of Korea
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Hong Woo-Pyo
Department of Electronics Engineering, Catholic University of Daegu, Hayang, Kyeongbuk 712-702, Republic of Korea
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Hong Woo-Pyo
Department of Electronics Engineering, Catholic University of Daegu, Gyeongsan, Gyeongbuk 712-702, Republic of Korea
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