Colorimetric porous photonic bandgap sensors with integrated CMOS color detectors

In this paper, the development of a novel colorimetric sensor system based on the integration of complementary metal-oxide-semiconductor (CMOS) color detectors with a modified porous polymeric photonic bandgap sensor is reported. The color detector integrated circuit IC is implemented with AMI (AMI Semiconductor) 1.5 mum technology, a standard CMOS fabrication process available at MOSIS (http://www.mosis.org). The color detectors are based on the spectral responses of buried double junctions (BDjs) and stacked triple junctions (STJs); the ratio of the photocurrents at the junctions provides spectral information. Both types of color detectors are characterized with a monochromator, and the results are compared. The BDJ color detector is used with a porous photonic bandgap reflection grating whose reflection spectra shifts as a function of the concentration of vapor analyte present. The experimental results verify that the color change of the photonic crystal can be detected and correlated to the change in analyte concentration. The entire system is compact and low power

[1]  D. Poenar,et al.  Colour sensor for (bio)chemical/biological discrimination and detection , 2002 .

[2]  G. Sberveglieri,et al.  A Porous Silicon Microcavity as an Optical and Electrical Multipatrametric Chemical Sensor , 2002 .

[3]  Gerard Sou,et al.  Colour detection using a buried double p-n junction structure implemented in the CMOS process , 1996 .

[4]  Michael J. Sailor,et al.  Polymer Replicas of Photonic Porous Silicon for Sensing and Drug Delivery Applications , 2003, Science.

[5]  Lalgudi V. Natarajan,et al.  Switchable Holographic Polymer-Dispersed Liquid Crystal Reflection Gratings Based on Thiol−Ene Photopolymerization , 2003 .

[6]  Lalgudi V. Natarajan,et al.  Holographic Formation of Electro‐Optical Polymer–Liquid Crystal Photonic Crystals , 2002 .

[7]  S. M. Sze,et al.  Physics of semiconductor devices , 1969 .

[8]  Z. Gaburro,et al.  Improved reversibility in aged porous silicon NO2 sensors , 2004 .

[9]  M. Ghadiri,et al.  A porous silicon-based optical interferometric biosensor. , 1997, Science.

[10]  G. Michard,et al.  A colorimetric method with the use of BDJ detector for seawater pH measurement , 1998 .

[11]  Michael J Sailor,et al.  Biomolecular screening with encoded porous-silicon photonic crystals , 2002, Nature Materials.

[12]  Lorenzo Pavesi,et al.  Porous silicon microcavities as optical chemical sensors , 2000 .

[13]  Paras N. Prasad,et al.  Optical microfabrication of highly reflective volume Bragg gratings , 2005 .

[14]  V. Timoshenko,et al.  Dichroic Bragg reflectors based on birefringent porous silicon , 2001 .

[15]  G. Sou,et al.  Investigation of CMOS BDJ detector for fluorescence detection in microarray analysis , 2000, 1st Annual International IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine and Biology. Proceedings (Cat. No.00EX451).

[16]  G. Sou,et al.  Design and testing of a CMOS BDJ detector for integrated micro-analysis systems , 2001 .

[17]  Guo-Neng Lu,et al.  Sensitivity estimation of CMOS optical BDJ detector , 2002 .

[18]  G. de Graaf,et al.  Smart Optical Sensor Systems in CMOS for Measuring Light Intensity and Colour , 1998 .

[19]  Jun Gao,et al.  Tuning the Response and Stability of Thin Film Mesoporous Silicon Vapor Sensors by Surface Modification , 2002 .

[20]  Reinoud F. Wolffenbuttel,et al.  Optical CMOS sensor system for detection of light sources , 2004 .