Two-dimensional photonic crystals of rods with a dielectric cladding

T. Trifonov; L. F. Marsal; A. Rodriguez; J. Pallares; R. Alcubilla

doi:10.1117/12.608748

7 July 2005 Two-dimensional photonic crystals of rods with a dielectric cladding

T. Trifonov, L. F. Marsal, A. Rodriguez, J. Pallares, R. Alcubilla

Proceedings Volume 5840, Photonic Materials, Devices, and Applications; (2005) https://doi.org/10.1117/12.608748
Event: Microtechnologies for the New Millennium 2005, 2005, Sevilla, Spain

Abstract

We study the photonic band gap formation in 2D photonic crystals comprising rods covered with a thin interfacial layer. The dielectric constant of the interfacial layer is different from that of the rods and background material. The rod together with the surrounding interfacial layer can therefore be treated as a single rod having a core and cladding regions. We study how the thickness and the dielectric constant of the cladding material affect the properties of photonic gaps in 2D photonic lattices. Specifically, we consider triangular and honeycomb lattices consisting of air rods drilled in silicon matrix and silicon rods in air, respectively. Photonic band simulations of such structures are presented performed using both finite-difference time-domain and plane-wave expansion methods. We show that the physical properties of the cladding layer strongly influence the photonic gap parameters. In particular, the existence of dielectric cladding reduces the absolute PBG in case of air rods drilled in a dielectric host, but may lead to larger absolute gaps in case of dielectric rods embedded in air. We also discuss the practical technological feasibility of these structures and their experimental realization.

Citation Download Citation

T. Trifonov, L. F. Marsal, A. Rodriguez, J. Pallares, and R. Alcubilla "Two-dimensional photonic crystals of rods with a dielectric cladding", Proc. SPIE 5840, Photonic Materials, Devices, and Applications, (7 July 2005); https://doi.org/10.1117/12.608748

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