NDLI: THz emission from high-T/sub c/ superconductors by optical pulse excitation

Content Provider	IEEE Xplore Digital Library
Author	Hangyo, M. Tomozawa, S. Murakami, Y. Tonouchi, M. Tani, M. Wang, Z. Sakai, K.
Copyright Year	2002
Abstract	Emission of ultrashort electromagnetic pulses from current-biased superconducting YBCO films has been observed by exciting with femtosecond laser pulses. The emission device is made of YBCO strip lines with a bridge at their center on an MgO substrate. The electric field of the pulse is detected by a photoconductive switch made of LT-GaAs. The emitted pulse width is /spl sim/0.5 psec and its Fourier component extends up to 2 THz. Characteristics of the THz emission such as bias current, pump power and temperature dependence are investigated in detail. The emission mechanism is ascribed to the ultrafast supercurrent modulation caused by the photoexcitation.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	3730
Ending Page	3733
Page Count	4
File Size	457002
File Format	PDF
ISSN	10518223
Volume Number	7
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-06-01
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 EMP radiation effects Superconducting films Yttrium barium copper oxide Switches Strips Bridges Photoconductivity Space vector pulse width modulation Temperature dependence
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Ultrafast photoexcited quasiparticle dynamics in YBCO films observed by THz emission

Measurement of the penetration depth of superconducting thin films by optoelectronic sampling techniques

Observation of supercurrent distribution in YBCO thin film devices by photoexcited THz radiation

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Nanosecond inductive energy storage pulsed power system using YBCO superconductor opening switches

THz beam generation from YBCO thin films using a 1.55 /spl mu/m femtosecond laser

Properties of lift-off structured high T/sub c/ microbridges

Transient flux dynamics in optically irradiated YBCO thin-film switches

THz emission from high-T/sub c/ superconductors by optical pulse excitation

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