Optically tunable acoustic wave band-pass filter | Zendy

N. Swinteck | Zendy; Pierre Lucas | Zendy; Pierre A. Deymier | Zendy

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Optically tunable acoustic wave band-pass filter

Author(s) -

N. Swinteck,

Pierre Lucas,

Pierre A. Deymier

Publication year - 2014

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4904075

Subject(s) - materials science , chalcogenide , photonics , band gap , optoelectronics , superlattice , optics , excitation , photonic crystal , chalcogenide glass , acoustic wave , optical filter , physics , quantum mechanics

The acoustic properties of a hybrid composite that exhibits both photonic and phononic behavior are investigated numerically with finite-element and finite-difference time-domain simulations. The structure is constituted of a periodic array of photonic resonant cavities embedded in a background superlattice. The resonant cavities contain a photo-elastic chalcogenide glass that undergoes atomic-scale structural reorganization when irradiated with light having energy close to its band-gap. Photo-excitation of the chalcogenide glass changes its elastic properties and, consequently, augments the acoustic transmission spectrum of the composite. By modulating the intensity of light irradiating the hybrid photonic/phononic structure, the position and spectral width of phonon passing-bands can be controlled. This demonstration offers the technological platform for optically-tunable acoustic wave band-pass filters

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