25 June 2007 Designing waveguides and microcavities in hybrid architectures based on direct and inverse opals
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Abstract
In the past few years, self assembly colloidal structures based on opals have received large attention because they offer a cost-effective way of designing ultra-compact and efficient all-optical devices. In this study, we present various approaches to design waveguides and cavities in three-dimensional opal-based photonic crystals. Three practical designs with size suitable to telecommunication technologies at 1.55 μm are presented. First, we show that the creation of a hexagonal superlattice of defects in a direct monolayer of spheres yields the opening of a photonic band gap below the light line so that the inclusion of a linear defect in this structure enables the creation of a theoretically lossless waveguide. We also propose the design of a waveguide in a 2D-3D heterostructure, where a graphite lattice of rods is sandwiched between two inverse opal claddings. This structure enables single-mode waveguiding with a maximal bandwidth of 129 nm. Finally, we give the design of a linear cavity, whose quality factor is increased by a factor of 5 when surrounded by an inverse opal.
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K. Vynck, K. Vynck, G. Qiu, G. Qiu, D. Cassagne, D. Cassagne, E. Centeno, E. Centeno, } "Designing waveguides and microcavities in hybrid architectures based on direct and inverse opals", Proc. SPIE 6593, Photonic Materials, Devices, and Applications II, 659319 (25 June 2007); doi: 10.1117/12.721874; https://doi.org/10.1117/12.721874
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