光子

The transmission coefficients through unmagnetized plasma photonic crystals are computed ,and the periodic characteristic of band gap structure for unmagnetized plasma photonic crystals is analyzed with them.

以微分高斯脉冲为激励源，用电磁波通过非磁化等离子体光子晶体后所得的透射系数来讨论非磁化等离子体光子晶体的禁带周期特性。

The transmission coefficients through unmagnetized plasma photonic crystals are calculated,and the effects of plasma temperature and density on characteristic of band gap structure for unmagnetized plasma photonic crystals is analyzed with them.

人们利用光子晶体的这个特性在光纤、发光二极管、光集成器件等方面有运用[4-6]。等离子体光子晶体是由Hojo等人[7]提出。它是由等离子体和介质或真空构成的人工周期性结构。

In the frequency domain, the transmission ratios of electromagnetic Gaussian pulses are computed and we analyzed the effect on defect mode properties of unmagnetized photonic crystals produced by its periodic constant, parameters of plasma and parameters of the defect layer, such as its dielectric coefficient, length and position.

从频域角度分析得到微分高斯脉冲的透射率，并讨论该光子晶体的缺陷层介电常数、厚度、位置、光子晶体的周期常数和等离子体参数对其缺陷模的影响。

The effect on periodic band gap of unmagnetized plasma is analyzed by its periodic structures and parameters of plasma.The electromagnetic propagation process of a Gaussian pulse through an unmagnetized plasma photonic crystal is investigated.

用时域有限差分法（Finite-Different Time-Domain，FDTD）中的电流密度卷积（Current Density Convolution，JEC）算法讨论了一维非磁化等离子体光子晶体的禁带周期特性，分析了非磁化等离子光子晶体的周期结构和等离子体参量对其禁带周期的影响。

A finite-difference time-domain algorithm is applied to study the one-dimensional unmagnetized plasma photonic crystals with inhomogeneous,collision,warm,isotropic plasma under the isothermal hypothesis.

光子晶体的概念最初是80年代末由John S，Yablonovitch E[1-2]等人提出来的，是近年来深受关注的一个新兴的研究方向[3]。光子晶体是由多种介质材料构成，不同介质材料在空间中有周期性的分布结构。

The third chapter contains my research work, which mainly focuses on Planar Photonic Bandgap. The idea of how to miniaturize Planar Photonic Bandgap by using spiral structures is proposed. Finally, by using ununiform method, the bandwidth, which is decreased due to miniaturization, are enlarged obviously.

首先介绍了平面光子晶体在微带线结构中的几种应用；然后阐述了我们在平面光子晶体小型化设计中所做的一些工作，包括仿真方案的选择，设计方案的制定与比较，以及与传统结构的比较；最后介绍了采用渐变周期结构对小型化所带来的带宽减少问题所做的改善工作。

The different photonic crystal structures with different chirped coefficients, and with different apodized functions are compared.

分别对不同啁啾系数的光子晶体结构和不同变迹形式的光子晶体结构进行了比较分析。

Compound Ⅴ-3 has the largest two-photon absorption cross section and strongest two-photon induced fluorescence in these compounds because of its octupolar structure and the delocalized interaction among the chromophores.

由于化合物Ⅴ-3的八偶极分子结构和发色团之间的电子离域相互作用，它在三个化合物中有最大的双光子吸收截面和最强的双光子荧光。

Assuming that the Raman gain profile of silica is a linear function, the author has given analytic solutions of N \|channel stimulated Raman scattering steady\|state coupling wave equation with equal channel separation and input photon fluxed.

从石英光纤具有的近似线性喇曼增益的特点出发，给出了等信道间隔、等初始输入光子通量条件下前向N信道受激喇曼散射稳态光子转换方程的解析解。

First, one-dimensional photonic quantum well structures operating in visible frequency region have been fabricated by sandwiching a different photonic crystal between two photonic barriers.

二：提出并系统地研究了一维多孔硅光子量子阱结构，实验和理论结果表明光子量子阱有类似于半导体量子阱结构的性质。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。