University at Buffalo
332 Bonner Hall
Buffalo, NY 14260
PH: (716) 645-1019
Web: http://www.ee.buffalo.edu/Titus.htm
E: ahtitus@buffalo.edu
120 Bonner Hall
Buffalo, NY 14260
PH: (716) 645-1013
Affiliations
University at Buffalo
458 Natural Sciences Complex
Buffalo, NY 14260
PH: (716) 645-6800, ext. 2102
Web: http://www.photonics.buffalo.edu/
Research
The image is a microphotograph of one of our detector arrays. The CMOS detectors have a micrograting on top, giving the appearance of different colors. The grid lines (too small to be visible here) are 270nm wide with a variable spacing of 270nm to 450nm.
Design and characterization of novel, custom integrated circuits for sensing applications system-level integration; integrated optoelectronic devices; artificial neural networks and artificial vision.
We have been developing novel CMOS detector arrays for use with sensors at the nano and micro scales. Our designs enable us to tailor the detection scheme to the specific sensor application, improving measurement capability and sensitivity. We have also been studying methods for improving spectral response of CMOS photodetectors using multiple junction photodetectors and deep submicrometer metallic grids.
K&S Model 4523 Wedge Wire bonder, full electronic characterization and test equipment suite (PC controlled)
Tanner Tools: Mask-level design and simulation tools
V. P. Chodavarapu, R. M. Bukowski, A. H. Titus, A. N. Cartwright, and F. V. Bright, "CMOS integrated luminescence oxygen multi-sensor system," Electronics Letters, vol. 43, pp. 688-689, 2007.
K. Bhagavathula, A. H. Titus, and C. Mullin, "An Extremely Low-Power CMOS Glare Sensor," IEEE Sensors Journal, vol. 7, pp. 1145-1151, 2007.
R. M. Bukowski, V. P. Chodavarapu, A. H. Titus, A. N. Cartwright, and F. V. Bright, "Phase Fluorometric Glucose Biosensor using Oxygen as Transducer and Enzyme doped Xerogels," Electronics Letters, vol. 43, pp. 202-204, 2007.
V. P. Chodavarapu, R. M. Bukowski, D. O. Shubin, A. H. Titus, A. N. Cartwright, and F.V. Bright, "CMOS-based Phase Fluorometric Oxygen Sensor System," IEEE Transactions on Circuits and Systems I, vol. 54, no. 1, pp. 111-118, 2007.
Y. Tang, Z. Tao, R. M. Bukowski, E. C. Tehan, S. Karri, A. H. Titusb and F. V. Bright, "Tailored Xerogel-Based Sensor Arrays and Artificial Neural Networks Yield Improved Accuracy and Precision," Analyst, vol. 131, no. 10, pp. 1129-1136, 2006.
R. M. Bukowski, M. D. Davenport, A. H. Titus and F. V. Bright, "O2-Responsive Chemical Sensors Based on Hybrid Xerogels that Contain Fluorinated Precursors," Applied Spectroscopy, vol. 60, no. 9, pp. 951-957, 2006.
S. S. Karri and A. H. Titus, "An Analog VLSI Velocity Sensor System for Depth Perception," IEEE Sensors Journal, vol. 6, pp. 1287-1297, 2006.
B. Jaiswal and A. H. Titus, "A Visualization Based Approach for Bump-pad/IO-ball Placement and Routing in Flip-chip/BGA Technology," IEEE Transactions on Advanced Packaging, vol. 29, no. 2, pp. 576-586, August 2006.
Z. Tao, E. C. Tehan, R. M. Bukowski, Y. Tang, E. L. Shughart, W. G. Holthoff, A. N. Cartwright, A. H. Titus, and F. V. Bright, "Templated xerogels as platforms for biomolecule-less biomolecule sensors," Analytica Chimica Acta, vol. 564, pp. 59-65, 2006.
X. Fang, V. K. S. Hsiao, V. P. Chodavarapu, A. H. Titus, and A. N. Cartwright, "Colorimetric Porous Photonic Bandgap Sensors with Integrated CMOS Color Detectors," IEEE Sensors Journal, vol. 6, no. 3, pp. 661-667, 2006.
M. Massoud and A. H. Titus, "An Analog VLSI Chip Emulating Polarization Vision of Octopus Retina," IEEE Transactions on Neural Networks, vol. 17, pp. 222-232, January 2006.
V. P. Chodavarapu, R. M. Bukowski, S. J. Kim, A. H. Titus, A. N. Cartwright, and F. V. Bright, "Multi-sensor system based on phase detection, an LED array, and luminophore-doped xerogels," Electronics Letters, vol. 41, pp. 1031-1033, 2005.
V.P. Chodavarapu, A. H. Titus and A.N. Cartwright , "Differential read-out architecture for CMOS ISFET Microsystems," Electronics Letters, vol. 41, no. 12, pp. 35-56, 2005.
S. Karri and A. H. Titus, "Toward an Analog VLSI System for Perceiving Depth Through Motion Parallax," Optical Engineering, vol. 44, no. 6, 006402, 2005.
A. H. Titus, B. Jaiswal, T. J. Dishongh, and A. N. Cartwright, "Innovative circuit board level routing designs for BGA packages," IEEE Transactions on Advanced Packaging, vol. 27, pp. 630-9, 2004.
M. Davenport, A. H. Titus, E. C. Tehan, Z. Tao, Y. Tang, R. M. Bukowski, and F. V. Bright, "Chemical Sensing Systems Using Xerogel-Based Sensor Elements and CMOS Photodetectors," IEEE Sensors Journal, vol. 4, pp. 180 - 188, 2004.