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25 April 2002 Suzuki phase in two-dimensional photonic crystals
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Proceedings Volume 4655, Photonic Bandgap Materials and Devices; (2002)
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States
When rows of cylinders are periodically removed from a hexagonal array of dielectric cylinders, a new two-dimensional (2D) photonic crystal (PC) arises. The new structure consists of a lattice of vacancies embedded in the initial hexagonal lattice. We called it Suzuki Phase because it remains similar structures discovered in the 60's by K. Suzuki studying alkali halides. A plane-wave algorithm as well as a 2D finite difference-time-domain method has been employed to study the photonic properties of this PC as a function of the filling fraction (f) in the case of high dielectric cylinders ((epsilon) equals 13.6) in air. For TM- modes, it is shown that in a certain range of f an isolated miniband appears in the gap of the initial hexagonal lattice. The miniband, which is created by the coupling of defect states, is described by a tight-binding formalism with two parameters. Also, the frequencies of the two possible vacancy defects in the SP have been obtained and their symmetry analyzed.
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Jose Sanchez-Dehesa, Felipe Ramos-Mendieta, Jorge Bravo-Abad, Javier Marti, Alejandro Martinez, and Andres Garcia "Suzuki phase in two-dimensional photonic crystals", Proc. SPIE 4655, Photonic Bandgap Materials and Devices, (25 April 2002);

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