phase_in_material.py

import meep as mp

cell_size = mp.Vector3(6,6,0)

geometry1 = [mp.Cylinder(center=mp.Vector3(),radius=1.0,material=mp.Medium(index=3.5))]

sim1 = mp.Simulation(cell_size=cell_size,
                    geometry=geometry1,
                    resolution=20)

sim1.init_sim()

geometry2 = [mp.Cylinder(center=mp.Vector3(1,1),radius=1.0,material=mp.Medium(index=3.5))]

sim2 = mp.Simulation(cell_size=cell_size,
                    geometry=geometry2,
                    resolution=20)

sim2.init_sim()

sim1.fields.phase_in_material(sim2.structure,10.0)

sim1.run(mp.at_beginning(mp.output_epsilon),
         mp.at_every(0.5,mp.output_epsilon),
         until=10)