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30 March 2012 Dynamically tuned zero-gap phoXonic systems
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A full electrodynamic and elastodynamic multiple scattering approach is employed to describe the optical and acoustic modes, and to account for their mutual interaction both in time and frequency domain in one-dimensional phoXonic crystal slabs. We report on the occurrence of nonlinear acousto-optic interactions and demonstrate the effect of the hypersonic tuning of photonic Dirac points in the optical and telecom frequencies. Potential sensing capabilities are examined under moderate acousto-optic interactions in the proximity of crossing photonic bands enabling light to slow down, stop or reverse. Quarter-wave stack arrangements are considered in the optical (polymeric-based slab) and IR (Si-based slab) frequencies. Such structures support two bands that cross symmetrically, without forming a photonic gap. In the vicinity of the Dirac point (crossing bands), dynamic tuning achieves efficient transfer of energy between the bands using weak and slow modulations of the wave velocity. Finally, through hypersonic light modulation, we may achieve efficient electromagnetic pulse reversal and switching.
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Ioannis E. Psarobas and Vassilios Yannopapas "Dynamically tuned zero-gap phoXonic systems", Proc. SPIE 8346, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2012, 83460K (30 March 2012);

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