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cxg05116

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[½»Á÷] Çó½Ì radiation pattern of third harmonic generation

´ó¼ÒºÃ£¡ÎÒÊÇËãThird harmonic generationµÄ¡£µ±ÎÒÔÚËãµ½radiation patternµÄʱºò£¬ÀÏÊDz»¶Ô¡£ÓÐËã¹ýµÄ³æÓÑÄÜ·ñ¸ø¸öÌáʾ£¿¸Ð¼¤²»¾¡£¡£¡£¡

Ö÷Òªmatlab code:
n1=1.5;                % refractive index            
NA=1.4;                 % ÊýÖµ¿×¾¶
almax=asin(NA/n1);
%thetaR=linspace(0,almax,N);
phiR=linspace(0,2*pi,N);


U=yy£» %yyÊÇ 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);    %%2piÔÚǰ£¬piÔÚºóÃæ£¬×îºór %%%%

%plotting routine
surf(x,y,z)
title('Radition Pattern (D=1.0lamda)')
xlabel('x')
ylabel('y')
zlabel('z')
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