21 June 2002 Geiger mode avalanche photodiodes for microarray systems
Author Affiliations +
Proceedings Volume 4626, Biomedical Nanotechnology Architectures and Applications; (2002) https://doi.org/10.1117/12.472068
Event: International Symposium on Biomedical Optics, 2002, San Jose, CA, United States
Abstract
New Geiger Mode Avalanche Photodiodes (GM-APD) have been designed and characterized specifically for use in microarray systems. Critical parameters such as excess reverse bias voltage, hold-off time and optimum operating temperature have been experimentally determined for these photon-counting devices. The photon detection probability, dark count rate and afterpulsing probability have been measured under different operating conditions. An active- quench circuit (AQC) is presented for operating these GM- APDs. This circuit is relatively simple, robust and has such benefits as reducing average power dissipation and afterpulsing. Arrays of these GM-APDs have already been designed and together with AQCs open up the possibility of having a solid-state microarray detector that enables parallel analysis on a single chip. Another advantage of these GM-APDs over current technology is their low voltage CMOS compatibility which could allow for the fabrication of an AQC on the same device. Small are detectors have already been employed in the time-resolved detection of fluorescence from labeled proteins. It is envisaged that operating these new GM-APDs with this active-quench circuit will have numerous applications for the detection of fluorescence in microarray systems.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Don Phelan, Carl Jackson, R. Michael Redfern, Alan P. Morrison, and Alan Mathewson "Geiger mode avalanche photodiodes for microarray systems", Proc. SPIE 4626, Biomedical Nanotechnology Architectures and Applications, (21 June 2002); doi: 10.1117/12.472068; https://doi.org/10.1117/12.472068
PROCEEDINGS
9 PAGES


SHARE
Advertisement
Advertisement
Back to Top