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(a) Formation of holographic refractive index grating in the pure photopolymer material. (b) Construction of holographic refractive index grating and plasmon-induced absorption grating in the gold nanoparticles doped photopolymer.
(a) Angular selectivity curves of the mixed gratings for different values of absorption modulation D 1. (b) The diffracted amplitude as a function of absorption modulation D 1 for various values of average absorption constant and the depth of absorption modulation .
(a) Absorption spectrum of the gold NPs soluble in hexane solvent (black dotted line), the solid PQ-PMMA films without gold NPs (blue dash line), and the PQ-PMMA films with gold NPs (red solid line). The inset shows a TEM image of the gold NPs. (b) Temporal evolution of diffraction efficiency for PQ-PMMA (black solid spheres), PQ-PMMA with 0.05 vol. % (red solid upper triangles), and 0.24 vol. % gold NPs (blue solid squares).
(a) The angular selectivity curves of PQ-PMMA (black solid spheres), PQ-PMMA with 0.05 vol. % (red solid upper triangles), and 0.24vol. % gold NPs (blue solid squares). (b) Maximum value in volume holographic diffraction efficiency of the prepared samples as a function of gold NPs concentration.
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