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Optical injection probing of single ZnO tetrapod lasers [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2004.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
vp : digital, PDF file
Additional Creators:
Lawrence Berkeley National Laboratory, United States. Department of Energy. Office of Basic Energy Sciences, National Science Foundation (U.S.), and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
The properties of zinc oxide (ZnO) nanotetrapod lasers are characterized by a novel ultrafast two-color pump/stimulated emission probe technique. Single legs of tetrapod species are isolated by a microscope objective, pumped by 267 nm pulses, and subjected to a time-delayed 400 nm optical injection pulse, which permits investigation of the ultrafast carrier dynamics in the nanosize materials. With the optical injection pulse included, a large increase in the stimulated emission at 400 nm occurs, which partially depletes the carriers at this wavelength and competes with the normal 390 nm lasing. At the 390 nm lasing wavelengths, the optical injection causes a decrease in the stimulated emission due to the energetic redistribution of the excited carrier depletion, which occurs considerably within the time scale of the subpicosecond duration of the injection pulse. The effects of the optical injection on the spectral gain are employed to probe the lasing dynamics, which shows that the full width at half maximum of the lasing time is 3 ps.
Report Numbers:
E 1.99:lbnl--56642
lbnl--56642
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Published through SciTech Connect.
11/23/2004.
"lbnl--56642"
Chemical Physics Letters 404 1-3 FT
Leone, Stephen R.; Song, Jae Kyu; Szarko, Jodi M.; Swart, Ingmar; Li, Shihong; Zhao, Yiping; Blackledge, Charles Wesley.
Korea Science and Engineering Foundation (US)
Funding Information:
AC03-76SF00098
400101
View MARC record | catkey: 14446872