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10 April 2014 Sensing light and sound velocities with phoxonic crystals
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We study theoretically the potentiality of dual phononic-photonic (the so-called phoxonic) crystals for liquid sensing applications. We investigate the existence of well-defined features (peaks or dips) in the transmission spectra of acoustic and optical waves and estimate their sensitivity to the sound and light velocities of the liquid environment. Two different sensors are investigated. In the first one, we study the in-plane transmission through a two-dimensional (2D) crystal made of cylindrical holes in a Si substrate where one row of holes is filled with a liquid. In the second one, the out of plane propagation is investigated when considering the transmission of the incident wave perpendicular to a periodic array of holes in a slab. Such ultra compact structure is shown to be a label-free, affinity-based acoustic and optical nanosensor, useful for biosensing applications in which the amount of analyte can be often limited.
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Samira Amoudache, Rayisa Moiseyenko, Yan Pennec, Bahram Djafari Rouhani, Antoine Khater, Ralf Lucklum, and Rachid Tigrine "Sensing light and sound velocities with phoxonic crystals", Proc. SPIE 9062, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014, 90620S (10 April 2014);


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