Abstract
A novel model for photoinduced mass transport was proposed. The equation of motion describing the photoinduced mass transport was obtained by introducing inhomogeneous viscosity and incompressibility to Cauchy's equation of motion, which is a master equation of the phenomenon. The force that acts on the dipole that is induced in azobenzene polymer by the electromagnetic field and surface tension force were considered to be the driving forces for photoinduced mass transport. A newly developed electromagnetic-induced particle transport method based on moving particle analysis was used to calculate the equation of motion and the electromagnetic field numerically. The surface relief grating was formed by illuminating two-beam interference and the surface relief shape was investigated using the original calculation method. The inhomogenous viscosity that explains this phenomenon was investigated by considering the SRG erasure process in detail.
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