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Sensors 2013, 13(4), 4694-4713; doi:10.3390/s130404694
Review

Photonic Crystal Sensors Based on Porous Silicon

Received: 8 February 2013; in revised form: 26 March 2013 / Accepted: 3 April 2013 / Published: 9 April 2013
(This article belongs to the Special Issue Photonic Crystal Sensors)
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Abstract: Porous silicon has been established as an excellent sensing platform for the optical detection of hazardous chemicals and biomolecular interactions such as DNA hybridization, antigen/antibody binding, and enzymatic reactions. Its porous nature provides a high surface area within a small volume, which can be easily controlled by changing the pore sizes. As the porosity and consequently the refractive index of an etched porous silicon layer depends on the electrochemial etching conditions photonic crystals composed of multilayered porous silicon films with well-resolved and narrow optical reflectivity features can easily be obtained. The prominent optical response of the photonic crystal decreases the detection limit and therefore increases the sensitivity of porous silicon sensors in comparison to sensors utilizing Fabry-Pérot based optical transduction. Development of porous silicon photonic crystal sensors which allow for the detection of analytes by the naked eye using a simple color change or the fabrication of stacked porous silicon photonic crystals showing two distinct optical features which can be utilized for the discrimination of analytes emphasize its high application potential.
Keywords: photonic crystal; porous silicon; sensor photonic crystal; porous silicon; sensor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Pacholski, C. Photonic Crystal Sensors Based on Porous Silicon. Sensors 2013, 13, 4694-4713.

AMA Style

Pacholski C. Photonic Crystal Sensors Based on Porous Silicon. Sensors. 2013; 13(4):4694-4713.

Chicago/Turabian Style

Pacholski, Claudia. 2013. "Photonic Crystal Sensors Based on Porous Silicon." Sensors 13, no. 4: 4694-4713.



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