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Phoxonic structure with Photonic and Phononic Stop Bands at the same reduced frequency

In this work we investigate the existence of an one-dimensional Porous Silicon (PS) based structure possesing simultaneously Photonic and Phononic Band Gaps at the same reduced frequency. We present rigorous electrodynamic and elastodynamics calculations of the eigenvalues of the wave equations for electromagnetic and longitudinal (transverse) mechanical vibrations. The PS structure is identified as a PhoXonic structure exhibiting ranges of forbidden frequencies for visible light and hypersound.