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Title: Optical injection probing of single ZnO tetrapod lasers

Abstract

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.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Director. Office of Science. Office of Basic Energy Sciences. Materials Science and Engineering Division; National Science Foundation Contracts ECS-0210106 and ECS-0204340; Korea Science and Engineering Foundation (US)
OSTI Identifier:
838075
Report Number(s):
LBNL-56642
R&D Project: 400101; TRN: US200507%%304
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Journal Article
Journal Name:
Chemical Physics Letters
Additional Journal Information:
Journal Volume: 404; Journal Issue: 1-3; Other Information: Submitted to Chemical Physics Letters: Volume 404, No.1-3; Journal Publication Date: 03/07/2005; PBD: 23 Nov 2004
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; LASERS; MICROSCOPES; PROBES; STIMULATED EMISSION; WAVELENGTHS; ZINC OXIDES

Citation Formats

Szarko, Jodi M, Song, Jae Kyu, Blackledge, Charles Wesley, Swart, Ingmar, Leone, Stephen R, Li, Shihong, and Zhao, Yiping. Optical injection probing of single ZnO tetrapod lasers. United States: N. p., 2004. Web.
Szarko, Jodi M, Song, Jae Kyu, Blackledge, Charles Wesley, Swart, Ingmar, Leone, Stephen R, Li, Shihong, & Zhao, Yiping. Optical injection probing of single ZnO tetrapod lasers. United States.
Szarko, Jodi M, Song, Jae Kyu, Blackledge, Charles Wesley, Swart, Ingmar, Leone, Stephen R, Li, Shihong, and Zhao, Yiping. Tue . "Optical injection probing of single ZnO tetrapod lasers". United States. https://www.osti.gov/servlets/purl/838075.
@article{osti_838075,
title = {Optical injection probing of single ZnO tetrapod lasers},
author = {Szarko, Jodi M and Song, Jae Kyu and Blackledge, Charles Wesley and Swart, Ingmar and Leone, Stephen R and Li, Shihong and Zhao, Yiping},
abstractNote = {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.},
doi = {},
journal = {Chemical Physics Letters},
number = 1-3,
volume = 404,
place = {United States},
year = {2004},
month = {11}
}