Tunable lithium niobate photonic crystals : Simulation - Fabrication - Optical Characterization,

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Tunable lithium niobate photonic crystals : Simulation - Fabrication - Optical Characterization,

M. Roussey,F.I. Baida,M.-P. Bernal,Nadège Courjal-2005-01-01-HAL (Le Centre pour la Communication Scientifique Directe)

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TL;DRAbstract

Lithium niobate is a very attractive material because of its many different physical properties (acousto-optical and electro-optical effects, piezoelectricity ). We have already fabricated [1] and optically characterized lithium niobate photonic crystals showing the existance of a full photonic band gap (PBG). In this work, we have chosen the electro-optical effect to realize a tunable photonic crystal device. In order to achieve the most sensitive photonic crystal configuration for the electro-optical effect in lithium niobate, we have performed numerical simulations based on the FDTD (finite difference time domain) method. The structure to be modelled is a 2-dimensional lattice of circular apertures, where different defect geometries have been studied. In addition the fabrication and optical characterization of the previously simulated device will be presented.

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Lithium niobate is a very attractive material because of its many different physical properties (acousto-optical and electro-optical effects, piezoelectricity ). We have already fabricated [1] and optically characterized lithium niobate photonic crystals showing the existance of a full photonic band gap (PBG). In this work, we have chosen the electro-optical effect to realize a tunable photonic crystal device. In order to achieve the most sensitive photonic crystal configuration for the electro-optical effect in lithium niobate, we have performed numerical simulations based on the FDTD (finite difference time domain) method. The structure to be modelled is a 2-dimensional lattice of circular apertures, where different defect geometries have been studied. In addition the fabrication and optical characterization of the previously simulated device will be presented.

Keywords

Lithium niobateMaterials sciencePhotonic crystalFabricationFinite-difference time-domain methodPhotonicsOptoelectronicsCharacterization (materials science)

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