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Frequency response of solid-state impact ionization multipliers

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Permanent URL	http://hdl.lib.byu.edu/1877/1059
Title	Frequency response of solid-state impact ionization multipliers
BYU Creator	Beutler, Joshua Clauss, Carlton S. Johnson, Michael S. Hawkins, Aaron R.
Creator	Jack, Mike D. Chapman, George R. Kosai, Ken
Keywords	SIMs; ionization; frequency response
Description/Abstract	A study of the frequency response of solid-state impact ionization multipliers (SIMs) is presented that emphasizes the role of resistive and capacitive elements of the device to establish response limitations. SIMs are designed to amplify input currents from an external source through the impact ionization mechanism. An equivalent circuit model for the SIM is developed based on its current versus voltage characteristics, which is used to derive a frequency response model. Theoretical frequency response matches very closely to measured responses for first generation SIM devices constructed on p-type silicon epitaxial layers with nickel silicide Schottky contact injection points. Devices were measured using a photodiode as a current source under light intensities between 74 nA and 7.4 µA. These SIMs were shown to have a low frequency response that follows a KT/I relationship. Using an external photodiode with an effective capacitance of 6.8 pF, frequency response for a 1.8 µA input current was limited to 100 kHz. A large effective barrier resistance due to the Schottky contact and 12 kOmega space charge resistance dependent on device geometry dominate the response. Future SIM designs with higher frequency response will have to significantly lower both the input barrier resistance and space charge resistance.
Source	Beutler, Joshua L., Carleton S. Clauss, Michael S. Johnson, Aaron R. Hawkins, Mike D. Jack, George R. Chapman, and Ken Kosai. "Frequency response of solid-state impact ionization multipliers." Journal of Applied Physics 101 (2007);
Publisher	AIP
Date Original	2007-01-26
Language	English eng en
Publication Type	Peer-Reviewed Articles
Type	Text
Format	application/pdf
Owning Institution	Brigham Young University
BYU College	Ira A. Fulton College of Engineering and Technology
BYU Department	Electrical and Computer Engineering
Copyright Status	(c) 2007 American Institue of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Applied Physics and may be found at http://link.aip.org/link/?JAPIAU/101/023117/1;
Copyright Use Information	http://www.lib.byu.edu/generic_copyright.html

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