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Simulation of Photonic Crystals based on silicon nanopillars

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Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2019, Tutors: Elena López Aymerich, Albert Romano Rodriguez

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In this work we study the properties of 2D photonic crystals based on silicon nanopillars through electromagnetic simulations via the finite-difference time-domain method. Bandgaps will be analyzed through transmission spectra across different configurations and defects introduced in the structure in visible and near-infrared regions. An optimal bandgap size is found in terms of gap-midgap for an specific radius-to-pitch ratio. Additionally a modified waveguide is studied, showing a ressonance peak which can be used as a narrow-band filter.

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Simulation of Photonic Crystals based on silicon nanopillars