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10 September 2008 Applications of nanostructured porous silicon in the field of optical sensing
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Photonic crystals of finite thickness based on porous silicon were designed aiming at their subsequent use in the field of optical chemical- and bio-sensing. These structures consist in nanometric porous silicon rods arranged as to form a triangular lattice embedded into a silicon slab, resulting in dielectric structures that have two-dimensional periodicity and the use of index guiding to confine light in the third dimension. These structures enable the fabrication of photonic crystals in thin dielectric slab systems. The photonic band structure for the odd and even modes was calculated as a function of the thickness of the slab, finding a significant dependence on this parameter. The existence of a photonic band gap for even modes was verified and its size was maximized. In addition, the component of electric and magnetic field distribution perpendicular to the two-dimensional plane for the lowest-order even guided mode was analyzed.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
R. J. Martín-Palma, V. Torres-Costa, M. Manso, and J. M. Martínez Duart "Applications of nanostructured porous silicon in the field of optical sensing", Proc. SPIE 7041, Nanostructured Thin Films, 70410D (10 September 2008);

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