@article {2932,
	title = {Breakdown of the linear acousto-optic interaction regime in phoxonic cavities},
	journal = {Optics Express},
	volume = {22},
	year = {2014},
	pages = {31595-31607},
	abstract = {The limits of validity of the linear photoelastic model are investigated in a one-dimensional dual photonic-phononic cavity, formed by alternating layers of a chalcogenide glass and a polymer homogeneous and isotropic material, which supports both optical and acoustic resonant modes localized in the same region. It is shown that the linear-response regime breaks down when either the acoustic excitation increases or the first-order acousto-optic interaction coupling element vanishes by symmetry, giving rise to the manifestation of multiphonon absorption and emission processes by a photon. Our results provide a consistent interpretation of different aspects of the underlying physics relating to nonlinear acousto-optic interactions that can occur in such cavities.},
	author = {E. Almpanis and N. Papanikolaou and N. Stefanou}
}
