共查询到19条相似文献,搜索用时 54 毫秒
1.
2.
3.
测量三棱镜玻璃折射率的实验是普通物理实验的一个基础实验课题。在实验室里通常采用测量最小偏向角的方法进行测量。本文提出了一种利用光的偏振知识,在椭偏仪上实现棱镜折射率测定的一种方法。既扩大了学生的知识面,又使物理现象更加直观、明显,实验效果及重复性、稳定性都很好。 相似文献
4.
本文给出了两种测量双轴晶衬底上双轴晶单晶膜的折射率和膜厚的方法及测量的公式.我们利用这种方法测量了所研制的KTP光波导薄膜层的折射率和膜厚. 相似文献
5.
6.
本文报道了用可变入射角椭圆偏振仪(Variable angle incidence Spectroscopic Ellipsometer)测量Alq3,NPB,CuPc,Rubrene薄膜的光学常数,我们采用真空蒸镀法在硅衬底上分别制备了以上四种薄膜,然后我们用可变入射角椭圆偏振仪对四种薄膜进行了测量,测量在大气中进行,光谱范围从200到1000nm(或1.24到5cV),测量角度为65℃、70℃、75℃、80℃,接着,用Wvase32软件对四种薄膜的光学常数随波长(光子能量)的变化函数进行拟合,通过拟合我们得到了真空蒸镀的Alq3,NPB,CuPc,薄膜的光学常数随波长的变化函数及曲线,并且从材料吸收谱的吸收边,我们还得到了这些材料的光学禁带宽度。 相似文献
7.
8.
9.
本文介绍了各种椭偏仪的原理及性能,重点对外差式椭偏仪进行介绍,并对提出的几种外差透射椭偏仪的原理进行了实验验证。 相似文献
10.
11.
Taher M. El-Agez Sofyan A. Taya 《Optics and Lasers in Engineering》2011,49(4):507-513
A detailed mathematical derivation and an experimental characterization of one to two ratio rotating polarizer analyzer ellipsometer (RPAE) are presented. The alignment, calibration, and testing of reference samples are also discussed. The optical properties of some known materials obtained by the proposed ellipsometer will be shown and compared to accepted values. Moreover, the constructed ellipsometer will be tested using two ellipsometry standards with different thicknesses. 相似文献
12.
Recently, a rotating polarizer analyzer ellipsometer (RPAE) in which the two optical elements rotate in opposite directions with the same angular speed has been proposed. Calculated optical constants of some materials obtained from this ellipsometric configuration were in good agreement with published values except in the low photon energy regime. We here improve the structure by adding a fixed compensator after the rotating polarizer. The optical constants of c-Si calculated from the noisy signal in the low energy regime show a high reduction in the percent error when compared to that obtained from the previous structure that does not contain the fixed compensator. 相似文献
13.
Ellipsometers have been widely used in thin film characterization. They have shown a high degree of accuracy. We here propose theoretically a rotating polarizer and analyzer ellipsometer at a speed ratio 1:1 with a fixed compensator placed just after the rotating polarizer. Our calculations of the optical properties of c-Si and SiO \(_{2}\) reveal a substantial decrease in the percent error due to the fixed compensator. The uncertainties in the ellipsometric parameters as functions of the uncertainties of the Fourier coefficients are presented in details. 相似文献
14.
15.
16.
在一个折射率为N_2的基片上,镀制一层折射率为N_1=(N_0·N_2)~(12),厚度为d_1=λ/4(N_1~2-N_0~2Sin~2φ_0)~(-1/2)的透明介质薄膜,当一束波长为λ的线偏振光以特定的方位角α,在合适的入射角φ_0下,倾斜辐射到薄膜表面上时,可得到的反射光线为圆偏振光。 相似文献
17.
18.
19.
双锥光纤滤波器的研制 总被引:4,自引:1,他引:3
实验研究了熔锥条件对双锥光纤滤波器的影响。提出一个高斯模型,预测锥的几何形状。获得了窄带带通双锥光纤滤波器以及带阻中心波长分别为135nm和1559nm的带阻双锥光纤滤波器。 相似文献