NDLI: Ultrashort and ultrafast electrical pulse generator based on photoconductive semiconductor switch for biomedical applications

Content Provider	IEEE Xplore Digital Library
Author	Yuan, J. Liu, H. Xie, W. Li, H. Liu, J. Jiang, P.
Copyright Year	2011
Description	Author affiliation: Institute of Fluid Physics, CAEP, P. O. Box 919-108, Mianyang 621900, China (Yuan, J.; Liu, H.; Xie, W.; Li, H.; Liu, J.; Jiang, P.)
Abstract	High intensity (up to 300 kV/cm) short duration (10 ns or so) pulses can affect intracellular structures and induce apoptosis in biological cells, which can reduce the growth of $tumors^{1}.$ This application in biology and medicine requires ultrashort and ultrafast electrical pulse generator, which demands for high performance switches. Photoconductive semiconductor switches (PCSSs) have been chosen to generate ultrashort and ultrafast electrical pulse with polyester film pulse forming line due to their advantages over other switches, such as high power, fast response time, negligible time jitter, high repetition rate, and optical electrical isolation. Two kinds of PCSSs, namely, bulk PCSS and lateral PCSS, were fabricated from semi-insulating GaAs and integrated into the generator with pulse forming line, which was constructed with 13 layers polyester film. By adjusting parameters of pulse forming line and using laser pulse with duration of 80 ps to trigger the bulk switch, this generator has capability to generate electrical pulse with output voltage of 20 kV, pulse duration of 5 ns and rise time of 1 ns. However, when lateral PCSS was used in the generator, electrical pulse with duration of about 10 ns can be obtained. This pulse duration broadened due to peculiar photoconductivity of high power GaAs PCSS in nonlinear mode. By operating several generators in series, higher output voltage will be achieved and used for biomedical applications.
Starting Page	1
Ending Page	1
File Size	45593
Page Count	1
File Format	PDF
ISBN	9781612843308
ISSN	07309244
e-ISBN	9781612843292
e-ISBN	9781612843285
DOI	10.1109/PLASMA.2011.5993313
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical pulse generation Switches
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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