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首页> 外文期刊>Journal of the Physical Society of Japan >Parameter-Dependent Stimulated Photon Echo in CdSe/ZnS Quantum-Dot Quantum Well
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Parameter-Dependent Stimulated Photon Echo in CdSe/ZnS Quantum-Dot Quantum Well

机译：CdSe / ZnS量子点量子阱中参数相关的受激光子回波

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摘要

The energies of 1s states inside and outside the quantum well of a CdSe/ZnS quantum-dot quantum well (QDQW) and the transition dipole moment between these two states have been calculated by effective mass approximation. By using the calculation results, the longitudinal and transversal relaxation times of CdSe/ZnS have been approximated. We obtain a three-pulse photon echo (TPE) signal on the basis of the two states using the optical Bloch equations. We find that there should be four echoes in TPE from our theoretical calculation. In particular, the effects of the variation in core radius and shell thickness have been studied. It has been shown from the numerical calculation that the TPE signal is strongly dependent on the size and structure of the QDQW, and is dominated by relaxation time, which is also dependent on the size and structure.
机译：通过有效的质量近似计算了CdSe / ZnS量子点量子阱（QDQW）量子阱内部和外部的1s状态能量以及这两种状态之间的跃迁偶极矩。通过计算结果，可以得出CdSe / ZnS的纵向和横向弛豫时间。我们使用光学布洛赫方程在两种状态的基础上获得了三脉冲光子回波（TPE）信号。我们从理论计算中发现，TPE中应该有四个回波。特别地，已经研究了芯半径和壳厚度的变化的影响。从数值计算已经表明，TPE信号强烈地取决于QDQW的大小和结构，并且由弛豫时间主导，弛豫时间也取决于大小和结构。

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