%vortex beam
clear
clc
row=1080; %像素点设置成1080pix
g1=zeros(row); %生成1080阶零矩阵，初始化g1
g2=zeros(row); %生成1080阶零矩阵，初始化g1
w0=100; %束腰半径
l=3; %拓扑荷值
for m1=1:row %涡旋光函数
for n1=1:row
if (m1-row/2).^2+(n1-row/2).^2<row/2*row/2
g1(n1,m1)=sqrt((m1-row/2)^2+(n1-row/2)^2)^abs(l)*exp(-((m1-row/2)^2+(n1-row/2)^2)/w0^2)*exp(1i*l*atan2((n1-row/2),(m1-row/2)));
end
end
end
A0=max(max(abs(g1))); %球面波函数
for m1=1:row
for n1=1:row
if (m1-row/2).^2+(n1-row/2).^2<row/2*row/2
g2(n1,m1)=A0.*exp(-((m1-row/2)^2+(n1-row/2)^2)/(row*0.2)^2).*exp(1i*pi*-2*((m1-row/2)^2+(n1-row/2)^2)/(row/6)^2);
end
end
end
g=g1+g2; %涡旋光与平面光叠加
intensity=abs(g1); %涡旋光光强图
phase=angle(g1); %涡旋光相位图
figure();imshow(intensity,[]);colormap hot;
figure();imshow(phase,[]);colormap jet;
intensity1=abs(g);
figure();imshow(intensity1,[]);colormap hot;
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