Rigneault H, Flory F, Monneret S
Appl Opt. 1995 Jul 20;34(21):4358-69. doi: 10.1364/AO.34.004358.
Starting with an accurate linear electromagnetic theory of a totally reflecting prism coupled to a dielectric waveguide, we implement a numerical technique to take into account optogeometric perturbations in stratified media. We calculate both the reflected fields in intensity on the prism base (near field) and in infinity (far field) for an incident Gaussian beam. The study of the variations of the intensity in the reflected beam (near and far fields) versus light power shows thermoinduced dilation of the prism and an intensity-dependent refractive index of thin films composed of tantalium pentoxyde and titanium dioxide.
从一个与介质波导耦合的全反射棱镜的精确线性电磁理论出发，我们采用一种数值技术来考虑分层介质中的光学几何微扰。对于入射高斯光束，我们计算了棱镜底面（近场）和无穷远处（远场）的反射光强。对反射光束（近场和远场）光强随光功率变化的研究表明，棱镜存在热致膨胀，且由五氧化钽和二氧化钛组成的薄膜的折射率与光强有关。
