介电函数

采用牛顿辛普森方法确定超薄Al膜光学函数，进而计算其介电函数，得到了它们随膜厚变化的关系。

The optical function of the ultrathin Al film is obtained by Newton Raphson method , and dielectric function is calculated .

我们在该截止动能下，计算了纤锌矿GaN的晶格常数、能带结构、电子态密度和介电函数等。

At this condition , we calculate the wurtzite GaN lattice constant , energy band structure , electronic density of states and dielectric function and so on .

由介电函数探讨SERS效应的电磁增强机理

Discussion on the Electromagnetic Theory of SERS According to Dielectric Function

短周期GaAs／AlAs超晶格的光频介电函数谱理论的实验检验

Experimental Verification of Theoretical Calculation of Dielectric Function Spectra of Short-Period GaAs / AlAs Superlattices

用介电函数的三级微商谱精确确定GaxIn（1-x）P临界点的能量值

Accurately Determining the Position of Interband Transition Energy for the Ga xIn 1-x P by the Third Derivative Spectra of Dielectric Functions

在德鲁特模型的介电函数基础上，对自由电子弛豫时间引入尺度修正，建立了金属粒子n、k值随波长和粒径变化的尺度效应模型。

We bring in size parameter into relaxation time of free electron on basis of Drude model , and build a metal particle n and k model which vary with size and wavelength .

在介电函数和反射谱中，GaN高的透明性（<3.44eV）诱导了强的干涉振荡。

High optical transparency of GaN film induces strong interference oscillations below E_ ( 0 )( 3.44 eV ) in the measured dielectric function spectra and reflectance spectra .

由于Mg原子的电子分布与Zn原子的差异，使得低能量区和高能量区的吸收系数和介电函数随掺杂量变化，反射率和能量损失谱也发生了一些改变。

The Absorption and Dielectric function changes with the variation of the concentration of Mg atoms in the high and low energy ranges since the electronic distribution of Mg atom is different from that of the Zn atoms .

然后再对光学性质分析，通过研究光吸收系数、复折射率、介电函数的峰位得出本征TiO2光响应区主要在紫外区。

Then optical properties were analysed . By studying the peak value of absorption coefficient , refractive index and dielectric function , optical response area of intrinsic TiO2 mainly be in the UV area was educed .

其次，本文对N掺杂TiO2作了详细的分析，通过分析得出N掺杂TiO2能使能带带间隙减小，介电函数虚部和吸收系数光谱图都向低能区移动，即光吸收带实现红移。

Results show that N-doped TiO2 made energy band gap reduced , the imaginary part of dielectric function and absorption spectra are moving to low-energy area , that is , it can cause the absorption band of optical catalysis to red-shift .

测量了Au等样品的红外介电函数谱，并用德鲁得（Drude）模型作拟合运算，获得了与理论计算相一致的结果。

The spectra of the dielectric function for a Au film sample were measured and fitted with the Drude model . The result shows a very good agreement between experiment and theory .

对系统的介电函数作了RPA近似计算，得到了超导转变温度的表达式，并讨论了混合对效应。

The RPA approximation is used to calculate the dielectric function , to derive the expression for the superconducting transition temperature and to discuss the effect of hybrid pairs .

根据物理上的分析，我们得到GaN薄膜的振荡行为来源于点缺陷引起的共振态的结论，并利用经典的谐振子模型来描写位于共振态上的电子对于介电函数的贡献。

According to the physical analysis , the oscillation behavior has been attributed to the resonance states arosed from the point defects . The contribution to the dielectric function by the resonace states is characterized by the classical damped oscillator model .

用平面波赝势方法（PWP）计算了N掺杂锐钛矿型TiO2前后的光学特性，即介电函数虚部ε2（ω），光学吸收系数I（ω）和反射率R（ω）。

We have calculated the optical properties of anatase TiO_2 and anatase TiO_2 by N-doping by plane-wave pseudo-potential method ( PWP ), namely the imaginary part of dielectric function ε _2 (ω), the optical absorption coefficient I (ω) and the reflectivity R (ω) .

经带隙校正后，由Kramers-Kronic（K-K）色散关系计算了介电函数的实部。

With band gap correction , the real part of the dielectric function was derived from the imaginary part by Kramers-Kronig ( K-K ) dispersion relationship .

利用基于Mott散射截面和介电函数模型的MonteCarlo方法模拟了电子穿透掩膜的能量损失分布，其计算结果与实验结果符合很好。

We have calculated electron energy loss spectrum for electrons transmitted through a mask in projection electron lithography by Monte Carlo simulation based on the dielectric function model and Mott elastic scattering cross section . A good agreement between simulation and experiment is obtained .

利用材料模拟软件CASTEP精确计算了介质跃迁矩阵元，给出了ZnO的能量损失谱、介电函数、反射系数、消光系数以及其它相关光学参数。

The polarization matrix elements of the medium have been calculated precisely , the energy loss spectra , the dielectric functions , reflectance spectra , refractive index and extinction coefficient and other parameters have been given .

在三角阱的基础上，采用无规相近似方法（RPA）、介电函数张量理论和线性响应理论来研究二维电子气沟道中等离激元的性质。

On the basis of the triangle trap , the nature of plasmon in the two dimensional electron gas has been studied through the phase approximation method ( RPA ), dielectric function tensor theory and linear response theory .

用三点比例内插法分析介电函数的三级微商谱，精确地得到样品的带隙Eg、Eg+Δ0以及Eg以上成对结构跃迁的能量位置，并对其结果加以分析。

By means of three-point-scaling , the third derivative spectrum of the dielectric functions can be calculated . Thereby , the accurate E g , E g + Δ 0 and the energy position of transition for the paired structure above E g are obtained . The results are discussed .

利用Mermin型介电函数，我们将研究范围拓展到金属氧化物靶材和低速入射领域。

With this Mermin-type dielectric function , our research object can be enlarged to the cases for metal oxides or with small incident velocity .

介电函数的虚部可以由电子结构计算直接得到，对虚部进行带隙宽度修正后，利用Kramers-Kronig色散关心得到介电函数的实部。

The imaginary part of the dielectric function has been obtained directly from the electronic structure calculation . With band gap correction , the real part of the dielectric function can be derived from the imaginary part by the Kramers-Kronig relationship .

通过对典型Ⅳ-Ⅵ族化合物半导体材料PbTe红外介电函数的计算，讨论了能带非抛物性和载流子浓度在多能谷体系中的分布效应对红外介电函数的影响。

By means of detailed calculation of the infrared die-lectric function of the typical ⅳ - ⅵ compound semiconductor PbTe , we have discus-sed for the influence of the non-parabolic property of energy band and the free carrier distribution among the four valleys on the infrared dielectric function .

无界金属圆柱介电函数的经典尺寸效应

Classical size effects on dielectric function of metal cylinder with infinite length

光吸收介质的吸收系数与介电函数虚部的关系

The imaginary part of dielectric function and the absorption coefficient

半导体超晶格的介电函数倒数与快速电子能量损失谱

Inverse dielectric function and fast electron ENERGY-LOSS-SPECTRUM of semiconductor superlattices

Ⅳ-Ⅵ族半导体材料磁场下的红外介电函数

Infrared dielectric function of IV-VI compound semiconductor in magnetic field

基于有效介质理论的多孔硅有效介电函数模型

Porous silicon effective dielectric function modelling from effective medium theories

啊？她说，跟着屏息敛气地等候。量子阱中电子气的静态介电函数和屏蔽势

Static Dielectric Function of Electron Gas and Screened Potential in Quantum Wells

核物质中的介电函数性质

Property of the Dielectric Function in Nuclear Matter

多孔二氧化硅玻璃的有效介电函数

The Effective Dielectric Function of Porous SiO_2 Glass