Ultrafast photoconductive self-switching of subpicosecond electrical pulses

A novel photoconductive switch is proposed. The geometry of this ultrafast switch allows the rising edge of an ultrashort optical pulse to both turn on and turn off a terahertz electrical transient, making the device independent of the substrate material and charge carrier lifetime. A lumped-element...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2000-02, Vol.36 (2), p.130-136
Main Authors: Holzman, J.F., Vermeulen, F.E., Elezzabi, A.Y.
Format: Article
Language:English
Subjects:
Applied sciences
Charge carrier lifetime
Charge carriers
Connectors, relays, and switches
Devices
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Fabrication
Fundamental areas of phenomenology (including applications)
Geometrical optics
Mathematical models
Microstrip
Optical computers, logic elements, interconnects, switches
neural networks
Optical elements, devices, and systems
Optical materials
Optical pulses
Optical switches
Optics
Page description languages
Photoconducting materials
Photoconductivity
Photoexcitation
Physics
Quantum electronics
Switches
Switching
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Description
Summary:A novel photoconductive switch is proposed. The geometry of this ultrafast switch allows the rising edge of an ultrashort optical pulse to both turn on and turn off a terahertz electrical transient, making the device independent of the substrate material and charge carrier lifetime. A lumped-element model is used to analyze the operation of the switch. The model employed describes the photoexcitation of both a microstrip photoconductive switch layout and a coplanar photoconductive switch layout. It is found that both of the layouts are capable of achieving subpicosecond switching, with the coplanar layout offering greater ease of fabrication and device tunability.
ISSN:0018-9197
1558-1713
DOI:10.1109/3.823456