NDLI: High-intensity terahertz pulses at 1-kHz repetition rate

Content Provider	IEEE Xplore Digital Library
Author	Budiarto, E. Margolies, J. Jeong, S. Son, J. Bokor, J.
Copyright Year	1965
Abstract	We report the generation of terahertz pulses with 0.4-/spl mu/J pulse energy at 1-kHz repetition rate using a large-aperture GaAs photoconductor with 3-cm gap aluminum electrodes, biased at voltages up to 45 kV. The terahertz output energy saturates at a laser fluence of 40 /spl mu/J/cm/sup 2/ at low-bias fields, while no clear saturation point was observed at high-bias fields. The output was found to be dependent on the repetition rate: at high fluences, pulse energy at 1 kHz is higher than that at 100 Hz by as much as 60%. A study of the behavior of the terahertz pulse energy and pulsewidth as a function of the pulsewidth of the laser excitation was conducted and compared with theoretical predictions. Propagation properties of the terahertz beam were also characterized, leading to a focal spot size as small as 800 /spl mu/m at the focus of a 2.5-in focal length parabolic mirror.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	1839
Ending Page	1846
Page Count	8
File Size	916150
File Format	PDF
ISSN	00189197
Volume Number	32
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical pulses Space vector pulse width modulation Optical pulse generation Gallium arsenide Photoconductivity Aluminum Electrodes Voltage Laser theory Laser excitation
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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