[交流] 求教 radiation pattern of third harmonic generation

大家好！我是算Third harmonic generation的。当我在算到radiation pattern的时候，老是不对。有算过的虫友能否给个提示？感激不尽！！！ 主要matlab code: n1=1.5;                % refractive index             NA=1.4;                 % 数值孔径 almax=asin(NA/n1); %thetaR=linspace(0,almax,N); phiR=linspace(0,2*pi,N); U=yy； %yy是 THG power for n=1:length(thetar)     thetar(n,=thetar(1,; end % expanding phi to span entire space phir=phir'; for mm=1:length(phir)     phir(:,mm)=phir(:,1); end % expanding U to span entire space for k=1:length(yy)     U(k,=yy(1,; end % converting to spherical coordinates [x,y,z]=sph2cart(phir,thetar,U);    %%2pi在前，pi在后面，最后r %%%% %plotting routine surf(x,y,z) title('Radition Pattern (D=1.0lamda)') xlabel('x') ylabel('y') zlabel('z')

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