Two planes cutting each other

I'm supposed to draw graph of two plane : the picture must look like this :

This is my code and It does not work out :

x = linspace (0,1,20);
z = linspace (0,1,20);
[x z]= meshgrid(x,z);
y = sqrt(x) + 0*z;
hold on ;
xlabel('x','FontSize',20);
ylabel('y','FontSize',20);
zlabel('z','FontSize',20);
surf(x,y,z,'FaceColor','b','FaceAlpha',0.5,'EdgeColor','none');
x = linspace (0,1,20);
y = linspace (0,1,20);
[x y]= meshgrid(x,y);
z = 1 - y + 0*x;
zlim = ([ 0 1] );
hold on ;
surf(x,y,z,'FaceColor','b','FaceAlpha',0.3,'EdgeColor','none');

I hope you guys could help me to solve this problem

Thank you !