排序方式: 共有7条查询结果,搜索用时 15 毫秒
1
1.
2.
3.
一种完整测量磁光克尔效应和法拉第效应的方法 总被引:3,自引:0,他引:3
详细给出了一种测量完整克尔和法拉弟效应的原理和实验装置。该装置简单可靠,安全由计算机控制。利用傅里叶变换方法,实验系统可以在从0.01度至几百度的克尔和法拉第旋转角范围内以及在1.5 ̄6.0eV的光子能量范围内,准确地测量克尔和法拉第旋转角范围内以及在1.5 ̄6.0eV的光子能量范围内,准确地测量克尔和法拉第效应的绝对值。作为实验测量的例子,给出了MnBiAl合金薄膜样品和GaP块状样品的克尔和法 相似文献
4.
5.
Porous silicon samples were prepared for optical studies by using the photoluminescence (PL), Raman scattering (RS), as well as the absolute reflectance and ellipsometry methods. Results show that the porous Si has low optic constants, and can trap the visible photons of more than 95%, but give no evidence of a strong interband transition existing in the vis-ible region. The Bruggeman effective-medium-approximation (EMA) and Lorentz oscillator models were used in data analyses. Calculations show that the layer dispersion effect may result in a red shift of the PL peak. The possible mechanism for the PL and Raman enhance-ment as well as the photon trap phenomenon was discussed, and was attributed mainly to the random multiple micro-reflections in the porous-Si layer having extremely large internal micro-Burfaces. 相似文献
6.
7.
观察了一系列Ⅲ-Ⅴ族化合物半导体合金GaAs1-xPx和AlxGa1-xAs样品的电解液电场调制反射光谱(EER)与合金组分参数X的关系.在临界点能量及其相关的自旋“轨道分裂Eg0,△0,Eg1,△1的计算中,采用了”三点调整法”.按照文献给出的公式,从Eg0的值求得所有GaAs1-xPx样品的组分.由此,通过最佳拟合法碍到[Eg0+△0](x)、Eg1(x)、(Eg1+△1)(x)的经验公式均为抛物线型的.在GaP(X=1)的情形中,明确地测得△1的值约为0.19eV,这与△1:△0比值的“2/3规则”有显著的偏离.本文还说明了,对半导体合金组分的光电压法测定中常用的线性型Eg0(x)假设,有必要进行二次项修正. 相似文献
1