Can't plot contour graph on a different plane

Question

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I plotted a contour graph on the x-y plane using this code with no problem:

figure(1)
iz = 1;
contourf(x_mesh(:,:,iz),y_mesh(:,:,iz),squeeze(g(:,:,iz)))

But once I tried to do it for the x-z plane, using this:

figure(2)
iy =1;
contourf(x_mesh(:,iy,:),y_mesh(:,iy,:),squeeze(g(:,iy,:)))

I got the following error:

"Error using contourf

Input arguments must have at most 2 dimensions."

Can anyone tell me why this is and how I can fix it? Here's the full code if it helps:

clear all
close all
clc
%Constant
rho = 4420;          %kg/m^3
Cp = 550;            %J/kg?K
T0 = 303.15;         %K
A = 0.5;             %[Absorbtivity] 
k = 7.2;             %W/m/K
alpha = 2.96*10^-6;  %m^2/s
D = alpha;
P = 100;             %W
v = 1;               %m/s
u = v;
Tm = 1933;        %K
d_laser = 0.0001;    %m
r_laser = d_laser/2; %m
a = r_laser;
p = D/(u*a);
%Define
n = 100;
x = linspace(-0.00025,0.00125,n);
y = linspace(-0.00025,0.00025,n);
z = linspace(-0.00008,0.0005,n);
%Normalized
x_nor = x/a;
y_nor = y/a;
z_nor = z/(D*a/u).^0.5
[x_mesh,y_mesh,z_mesh] = ndgrid(x_nor,y_nor,z_nor);
fun = @(t) exp((-z_mesh.^2./(4*t))-((y_mesh.^2+(x_mesh-t).^2)./(4*p.*t+1)))./((4.*p.*t+1).*sqrt(t));
g = integral(fun,0,Inf,'ArrayValued',true);
figure(1)
hold on
iz = 1;
[C,h]= contourf(x_mesh(:,:,iz),y_mesh(:,:,iz),squeeze(g(:,:,iz)))
[C1,h1] = contour(x_mesh(:,:,iz),y_mesh(:,:,iz),squeeze(g(:,:,iz)),LevelList=0.16713,Color='red')
hold off
clabel(C,h,'manual','Color','white')
clabel(C1,h1,'manual','Color','white')
xticks(-5:5:25)
yticks(-5:2.5:5)
axis([-5 25 -5 5]) 
title('x\primey\prime plane')
xlabel('x\prime')
ylabel('y\prime')
colorbar
figure(2)
iy =1;
contourf(x_mesh(:,iy,:),y_mesh(:,iy,:),squeeze(g(:,iy,:)))
axis([-5 25 -10 0])
title('x\primez\prime plane')
xlabel('x\prime')
ylabel('z\prime')
colorbar