激子

We have studied the spin injection of organic light emitting devices preliminarily. The organic light-emitting devices with ferromagnetic metal iron as the spin aligner and semi-transparent anode are fabricated.

我们认为如果能控制从阳极注入的空穴都是下自旋(自旋量子数为—1／2)从阴极注入的电子都是上自旋(自旋量子数为+1／2)，这样当他们在发光区相遇时，就只形成单线态激子而不形成三线态激子了。

By virtue of method of continuum approximate limit, we obtained the solitons of the vibration of lattice in one-dimensional harmonic and inharmonic chains of polarized molecule, under the conditions considering and inconsidering the interaction of exciton with phonon, through solving moving equations of exciton and phonon.

运用连续极限近似方法，通过求解声子和激子的运动方程，得到了在不考虑激子与声子的相互作用和考虑激子与声子相互作用两种情况下的极性分子简谐链和非简谐链中晶格振动的孤子解，并得出了激子与声子的相互作用的非线性效应类似于晶格三次势的非线性效应，以及相同的非线性效应不论是同时作用还是单独作用都具有相同的非线性效应的结论。

The results indicate, the ground state energy increased quickly as the decrease of ZnO QD radius, when the radius decreased to the effective Bohr radius of ZnO exciton (aB=1.8nm), the ground state energy is 488meV higher than the conduction band bottom, about 8 times of binding energy of ZnO free exciton. When the radius is larger, the ground state energy inclined to a constant (under conductor bottom about 65meV), approximate the binding energy of the exciton in bulk crystal ZnO.

计算结果表明，激子的基态能随着粒径的减小而迅速增大，当粒径减小至ZnO的激子玻尔半径时，其基态能高出体相ZnO禁带宽度488meV，约为ZnO自由激子结合能的8倍，而当粒径较大时，其基态能比ZnO导带底低65meV，与ZnO自由激子的结合能基本一致。

This material has excellent optical properties for fabricating semiconductor lasers operating at room temperature (The typical parameters are: efficient excitonic transition even at room temperature, the full width at half maximin of the intense exciton is 9meV at 90 K.).

材料具有很好的光学性能（典型数据：90K温度子带激子荧光半峰宽9meV，室温下仍有较强的激子发光），为制作室温半导体激光器提供了必要的条件。

The excitonic properties about recombination,transfer andscattering in semiconductors and superlattices are an importantresearch topic because of the optical properties of superlatticesand multiple quantum well in band edge depended on the excitonicfeature.

在半导体超晶格中，激子的行为决定了超晶格和量子阱的很多光学性质。因此有关激子的复合、跃迁及散射过程是一项重要的研究课题。

It should be stressed that the yield of singlet exciton in the process is very low, it is about 1%.

极化子与三重态激子的碰撞过程中单态激子的产率非常小(～1%)。

The ground-state binding energy of an exciton confined in quantum wires and quantum wells in the presence of a uniform electric field has been calculated under the effective-mass approximation using variational approach.

本文采用变分法研究了外加电场下无限深方形量子线中重空穴激子的束缚能，我们用平面波展开的方法求解在电场作用下无限深方形量子线中电子和空穴的基态能和基态波函数及低激发态的能量和波函数，并用所得到的波函数进一步计算激子的基态及低激发态的束缚能，最后计算了激子的Stark能移。

The results of Faraday rotation showed that Cd0.8Mn0.2Te had a Verdet constant up to 2 103deg/cm.T and a single-oscillator model fitted the data very well with the exciton energy E0=1.831eV, which proved that the sp-d exchange interaction was the main reason that introduced Faraday rotation to Cd0.8Mn0.2Te.

法拉第效应研究表明，晶体的Verdet常数的绝对值达到2 103deg/cm.T，采用单振子模型能够很好地拟合实验数据，得出晶体的激子能量E0=1.831eV，说明sp-d交换相互作用引起的激子跃迁对晶体的巨法拉第效应起到主要作用。

The third part of this thesis is the theoretical analysis of the effects of the non-linear interac-tions in the exciton microcavity QED.

第四章研究了激子微腔QED中腔场与库的非线性耦合以及激子-激子相互作用的效应。

The photo-induced absorptions at 753 nm and 800 nm were caused by the biexciton effect.

在高激发强度下，双激子效应引起的诱导吸收远远大于激子跃迁引起的光致漂白，双激子效应在非线性吸收中起着决定性作用。

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。