光子

We can use the defect in the photonic crystal to guide the electromagnetic wave, and this photonic crystal with defect can be used to make photonic crystal devices.

利用光子晶体的缺陷可以实现引导电磁波的目的，可以制作各种各样性能优异的光子晶体光学器件。

The main properties of one-dimensional photonic band gap structures that include layers of negative refraction material are analyzed from the explicit dispersion equation. The results show that the photonic crystals containing negative refraction materials have wider photonic band gaps which is different from the case of traditional photonic crystals with narrow transmission bands when the two layers have the same optical thickness.

从色散关系出发，通过数值模拟计算研究了由正折射率材料和负折射率材料交替组成的一维光子晶体的能带结构与光子晶体的结构参数之间的关系。

We also simulate the environment of photon experiment, and calculate the effect by use of fourfold symmetry torsion pendulum, we find that the double frequency effect caused by gravitational gradient is reduced a magnitude when we buildup the symmetry of measurement system.

我们还对二重对称扭秤的光子实验数据进行了分析，结果发现二倍频的效应为10~(-12)Nm 的量级，通过计算分析我们发现扭秤周围环境的不对称所引入的引力梯度效应是不容忽视的，因此针对喻家山人防山洞的具体情况，我们对光子实验的实际环境进行了模拟计算，理论分析结果表明对于二重对称的扭秤而言，环境不对称的影响引起的力矩效应为5.4940×10~(-10) Nm，对于四重对称的扭秤来说，效应为1.8668×10~(-11)Nm，可以看到随着扭秤对称性的增加，引力梯度的效应减小了一个数量级。

Based on the result of normalized frequency with effective refraction index -1 versus inner radius of ring-shaped holes we theoretically analysis the effects of structure parameters to equifrequency contours of respective normalized frequency and imaging properties.

通过光子晶体有效折射率的计算，得到了有效折射率为-1 的电磁波频率随空气环内径由0～0.2a 变化的规律，并由对应等频曲线的变化解释了结构参数对光子晶体平板成像的影响。

The geometries, electronic structures, one- and two-photon absorption spectra for a series of dendritic molecules have been studied.

与偶极矩化合物相比，八极矩分子具有更高的透明性和更大的双光子吸收截面，是更有前途的双光子吸收材料。

The peakpositions of the TPA spectra of this series of compounds are located at ～950 nm, and thecorresponding maximal TPA cross-section has been measured to be as large as〓.

双光子吸收谱的谱形与线性吸收谱相应波段内的谱形相似，与线性吸收的峰值波长的两倍相比较，双光子吸收峰值波长有微小蓝移。

In a quantum theory, there is no such a thing called fundamental mass of a particle. There is only a quantity called self-energy which takes into account all the self-interactions already.

我是这样想的，电子场是没有电磁场的，电子场与一个虚光子作用，电子场就变成了电子，虚光子则变成了电磁场，这就叫自能。

But there is no such thing as an antiphoton (photons are their own antiparticles, and are pure energy in any case), so that cannot apply here.

但是，没有反光子这种物质（光子是他们自己的反粒子，在任何情况下，都是纯粹的能量），所以这里并不适用这一原理。

But there is no such thing as an antiphoton (photons are their own antiparticles, and are pure energy in any case), so that cannot apply here.

但事实上并没有反光子（光子的反物质就是它本身，并且在任何情况下它们只能以能量的形式存在），所以之中情况在这里不适用。

Furthermore, we investigate the dependence of surface morphologies and continuities of metallic structures on fabrication conditions.

我们通过将表面活性剂引入多光子光还原过程，限制了金属纳米颗粒的还原生长，使多光子加工技术的金属加工分辨率超过传统光学理论衍射极限，实现了纳米尺度的金属加工。

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。