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Optical response of the MIM with varying Ag top layer thickness (10, 20, and 30 nm). (a) Schematic of the water penetration through the nanoporous top Ag layer. (b) Experimental (solid) and simulated (dashed) transmission peaks of the color filters with varying Ag top layer thickness in air and water (c). Time-dependent characteristics of water diffusion into the MIM with different top Ag layer thicknesses: (d) 10, (e) 20, and (f) 30 nm.
