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. 2012 Jul 3;7(1):370.
doi: 10.1186/1556-276X-7-370.

Tunable Fabry-Pérot interferometer based on nanoporous anodic alumina for optical biosensing purposes

Abel Santos  1 , Victor S Balderrama, María Alba, Pilar Formentín, Josep Ferré-Borrull, Josep Pallarès, Lluís F Marsal
Affiliations

Tunable Fabry-Pérot interferometer based on nanoporous anodic alumina for optical biosensing purposes

Abel Santos et al. Nanoscale Res Lett. .

Abstract

Here, we present a systematic study about the effect of the pore length and its diameter on the specular reflection in nanoporous anodic alumina. As we demonstrate, the specular reflection can be controlled at will by structural tuning (i.e., by designing the pore geometry). This makes it possible to produce a wide range of Fabry-Pérot interferometers based on nanoporous anodic alumina, which are envisaged for developing smart and accurate optical sensors in such research fields as biotechnology and medicine. Additionally, to systematize the responsiveness to external changes in optical sensors based on nanoporous anodic alumina, we put forward a barcode system based on the oscillations in the specular reflection.

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Figures

Figure 1
Figure 1
Set of ESEM top view images of NAA samples (scale bar = 1 μm). (a) R-OSC(1) (Lp = 5 μm, and dp = 30 nm). (b) R-OSC(2) (Lp = 5 μm, and dp = 41 nm). (c) R-OSC(3) (Lp = 5 μm, and dp = 52 nm). (d) R-OSC(4) (Lp = 5 μm, and dp = 71 nm).
Figure 2
Figure 2
Rspecularspectrum of NAA samples. (a) R-OSC(1 to 4) (Lp = 5 μm, and dp = 30, 41, 52, and 71 nm, respectively). (b) R-OSC(5 to 7) (dp = 30 nm, and Lp = 5, 8.7, and 12.4 μm, respectively).
Figure 3
Figure 3
Example of conversion of aRspecularspectrum into a barcode. (a) Rspecular spectrum of sample R-OSC(1). (b) Resulting barcode after conversion.
See this image and copyright information in PMC

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