激子

In the copolymers of fluorene and DBT, the efficient energy transfer due to exciton trapping on narrow band-gap DBT sites has been observed.

在芴与DBT的共聚物中，观察到了由于激子在低带隙单体DBT位置的捕获而产生的有效的能量转移。

The comparisons ofδ_ with simplified exciton model show that the effective coupling between boron center and individual fluorene arm is relatively strong.

采用简化激子模型来讨论CBTFn的双光子吸收截面值，说明在硼原子中心和芴分支间存在很强的有效电子耦合作用。

We show that in the absence of the external driving field,excitonic entanglement and mixedness exhibit a periodic oscillation.

结果表明：当无外加驱动场，激子的纠缠度和混合度呈现周期性的振荡。

We study the dynamics of entanglement and mixedness of the excitons in a system of the two driven quantum dots coupled to a single-model cavity field by means of the concurrence and the linear entropy.

向少华 ，郑青云借助于共生纠缠度和线性熵，研究了两个受驱动的量子点与单模腔场系统中激子纠缠度和混合度的演化动力学行为。

For InGaAs/AlGaAs system,however,the temper-ature dependences of the lifetime for four wells show that the nonradiative mechanismis more important and nonnegligible even at low temperature.

而在InGaAs/AlGaAs系统中，我们观察到四个不同阱宽的量子阱中激子寿命随温度变化的明显差别。

XRD showed hexagonal wurtzite structure. Room-temperature PL spectra of perfectly overcoated CdSe/ZnS only showed a narrow band edge emission. Emission peak was great red-shifted relative to absorption and the shift increases as the size decreases. The size-dependence of shift could be explained very well in terms of excition fine-structure model and stress at interface owing to lattice mismatch contributes to the shift between CdSe and CdSe/ZnS with the same size.

结果显示表面修饰完善的样品的荧光光谱只有一个窄而强的带边发射；所有样品的荧光峰相对于1S-1S吸收峰有较大的红移，并且移动量随尺寸的减小而增加，利用激子的精细结构模型很好地解释了红移量和尺寸的关系；核／壳结构的样品的吸收峰和荧光峰相对于同尺寸的单量子点也有红移现象，这是由于CdSe和ZnS的晶格失配在界面上产生压力造成的。

At present, film photocatalytic is studied mostly for treating with water pollution. Because the film will not bring the secondary pollution, and can be used again. ZnO film and TiO_2 film is mostly used as photocatalyzer, but they have some disadvantage, as they can only absorb little of the sun-light energy, the photoluminescence exciton compounds mostly, and they can be eroded easily by light. Complex semiconductor film is a good method to ravel out these problems.

目前，在光催化治理水污染方面，膜的光催化是一个研究的热点，因为膜催化不存在二次污染且便于回收和重复利用，研究较多的是ZnO薄膜和TiO_2薄膜，但是单一组分的薄膜存在光能利用率低，光激子复合率高，易发生光腐蚀等缺点，复合膜是解决该问题的有效途径，我们提出了全新的复合薄膜的制备方法—混合溶胶法。

Diphenyl-5-pyrenyl-2-pyrazoline shows the emission characteristics of pyrene in solution or the emission characteristics of pyrazoline in films and bulk crystals.

但是，DPP超微粒则表现出了分别出自于芘坏386 nm、吡唑啉环465 nm和分子之间的吡唑啉坏-芘环电荷转移激子570 nm的三重发射，而且各自对应各自的激发光谱，即三重发射的光通道互不干涉。

In the paper, what are introduced at first are the energy dispersions of quantum well, the interband transition and the exciton binding energy. Also some fabrication methods of GaN-based quantum well are mentioned.

首先，在第一章中介绍了量子阱的基本能带结构，带间跃迁以及激子束缚能，并简单介绍了几种量子阱的制备方法。

With an effective two-site Hubbard model, the dynamic behaviors of an exciton confined in coupled double quantum dot system driven by high AC field are investigated.

利用有效的两点Hubbard模型，研究了在高强度交变电场驱动下的双量子点分子中激子的动力学行为。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。