1. Porous Silicon Based Resonant Mirrors for Biochemical Sensing
- Author
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Edoardo De Tommasi, Lucia Rotiroti, Ilaria Rea, Paolo Arcari, Ivo Rendina, Annalisa Lamberti, Valentina Di Sarno, Carmen Sanges, Luca De Stefano, DE TOMMASI, E, DE STEFANO, L, Re, A I, DI SARNO, V, Rotiroti, L, Arcari, Paolo, Lamberti, Annalisa, Sanges, Carmen, and Rendina, I.
- Subjects
Electromagnetic field ,Materials science ,Physics::Optics ,Resonant Mirrors ,Porous silicon ,lcsh:Chemical technology ,Biochemistry ,Waveguide (optics) ,DNA Optical Biosensors ,Porous Silicon ,Article ,Analytical Chemistry ,Optics ,lcsh:TP1-1185 ,Electrical and Electronic Engineering ,Instrumentation ,Coupling ,business.industry ,DNA Optical Biosensor ,Atomic and Molecular Physics, and Optics ,Characterization (materials science) ,Prism ,business ,Biosensor ,Refractive index - Abstract
We report on our preliminary results in the realization and characterization of a porous silicon (PSi) resonant mirror (RM) for optical biosensing. We have numerically and experimentally studied the coupling between the electromagnetic field, totally reflected at the base of a high refractive index prism, and the optical modes of a PSi waveguide. This configuration is very sensitive to changes in the refractive index and/or in thickness of the sensor surface. Due to the high specific area of the PSi waveguide, very low DNA concentrations can be detected confirming that the RM could be a very sensitive and label-free optical biosensor.
- Published
- 2008