3D dispersion graph AMMs

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I am simulating a unit cell of a supposedly acoustic lieb structure in acpr module. I have my 1D band diagram where it is a plot of k vs freq and k is swept between 0 to 3. Now for illustrative purposes I wanted to plot a 3D dispersion diagram but I haven't been able to do it via COMSOL. How can i sweep kx and ky and a 3D surface?


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