Nonlinear optical absorption in the AgO x -type super-resolution near-field structure [glass/ZnS–SiO2 (170 nm)/AgO x  (15 nm)/ZnS–SiO2 (40 nm)] was investigated using a confocal Z-scan technique with a continuous He–Ne laser. The transmittance Z-scan shows that the sample undergoes a phase transition with increasing incident laser power. The phase transition of the sample with higher incident laser power is due to permanent local structure damage caused by the laser heating process.

A general class of mass transport models with Q species of conserved mass is considered. The models are defined on a lattice with parallel discrete time update rules. For one-dimensional, totally asymmetric dynamics we derive necessary and sufficient conditions on the mass transfer dynamics under which the steady state factorizes. We generalize the model to mass transfer on arbitrary lattices and present sufficient conditions for factorization. In both cases, explicit results for random sequential update and continuous time limits are given.

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