Share Email Print
cover

Proceedings Paper

Real-time and low-cost biosensors based on photonic bandgap structures
Author(s): J. García-Rupérez; J. G. Castelló; V. Toccafondo; P. Pérez-Millán
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We discuss the development of label-free, real-time and low-cost biosensors based on planar photonic bandgap (PBG) structures. We propose a novel power-based readout technique where the PBG shift is indirectly tracked by simply exciting the photonic sensing structure with a filtered broadband source and measuring the output power with a power meter. Therefore, the use of either tunable lasers or spectrum analyzers to continuously acquire the transmission spectrum of the structure, as done for other spectrum-based sensing techniques, is avoided. We have used this technique both for the sensing of refractive index variations as well as for the label-free detection of antibodies, showing high sensitivities and low detection limits, which demonstrate its high potential for the development of label-free, real-time and low-cost photonic biosensors. Furthermore, the use of broadband sources and detectors for the readout of the photonic sensors will also allow their integration, thus achieving a completely electrically accessed photonic biosensing device.

Paper Details

Date Published: 11 May 2012
PDF: 7 pages
Proc. SPIE 8431, Silicon Photonics and Photonic Integrated Circuits III, 84310O (11 May 2012); doi: 10.1117/12.921934
Show Author Affiliations
J. García-Rupérez, Univ. Politécnica de Valencia (Spain)
J. G. Castelló, Univ. Politécnica de Valencia (Spain)
V. Toccafondo, Univ. Politécnica de Valencia (Spain)
P. Pérez-Millán, Univ. Politécnica de Valencia (Spain)


Published in SPIE Proceedings Vol. 8431:
Silicon Photonics and Photonic Integrated Circuits III
Laurent Vivien; Seppo K. Honkanen; Lorenzo Pavesi; Stefano Pelli, Editor(s)

© SPIE. Terms of Use
Back to Top