High tunable optical properties of monolayer corrugated hetero-colloidal crystals

We design and fabricate a novel quasi-three dimensional corrugated hetero-colloidal crystal. Both measured and calculated results show a high tunable optical transmission response of the proposed structure via changing the geometry parameters of the coated dielectric film. Two different dielectric materials with low and relative higher refractive index are used as the coated films and different optical responses are achieved. Dual largely deepened transmission dips with a much bigger frequency shift are observed in the structure with a dielectric film consisting of higher dielectric constant materials. Our findings could provide potential applications in light harvesting and optical circuits. (C) 2013 Elsevier B.V. All rights reserved.