Simultaneous photonic and phononic band gaps in a two-dimensional lithium niobate crystal

Sadat-Saleh, Said; Benchabane, Sarah; Baida, Fadi; Bernal, Maria–Pilar; Laude, Vincent

doi:10.1109/ultsym.2009.5441768

Cited by 1 publication

(1 citation statement)

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“…Such a structure is interesting for the study of interactions between photons and phonons but also for the development and improvement of devices of integrated acousto-optic, such modulators or multiplexers. The theme of 2D phoxonic crystals is very recent since the first theoretical papers published are from 2006 [8][9], when Maldovan and Thomas [10][11] showed theoretically that the phononic and photonic bandgap can be obtained in 2D crystals for a square or hexagonal network of air holes in a silicon matrix. Thereafter, the method of supercells [12] demonstrated the existence of localized modes, for confining optical and an acoustic wave in a cavity.…”

Section: Introductionmentioning

confidence: 99%

Simulation of simultaneous photonic and phononic band gaps in Sapphire

2016

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The simultaneous existence of photonic and phononic band gaps in a simple square periodic array of holes drilled in sapphire substrate is investigated theoretically. The investigations are focused in a first part on a photonic gap obtaining with a phononic gap in the same time making use of some specific parameters. In the second part, using a cavity defect in which the strong confinement of acoustic and optic waves enhances the interaction, we obtain photonic and phononic modes classified according to their symmetry (even or odd), also allowed bands in gaps, which has led to the propagation of waves appropriate. The frequencies of the localized modes in the first band gap are computed with a finite element method.

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Section: Introductionmentioning

confidence: 99%