用MATLAB计算硅和二氧化硅的折射率，用MATLAB作图，画波长从1.2微米变化到1.7微米，折射率随波长变化的图

Answer 1

lamda=1.2:0.01:1.7;

n_si=11.6858+0.939816./lamda.^2+0.009934./(lamda.^2-1.1071^2);

n_sio2=1+0.6961663*lamda.^2./(lamda.^2-0.0684043^2)+0.4079426*lamda.^2./(lamda.^2-0.1162414^2)+0.8974794*lamda.^2./(lamda.^2-9.896161^2);

figure;plot(lamda,n_si);title('Si的折射率');

figure;plot(lamda,n_sio2);title('SiO_2的折射率');

Answer 2

可以分享一下公式出处吗，万分感谢！！