Lasing threshold dependence on excitation pulse duration in ZnO tetrapods

Y. F. Hsu; E. S.P. Leong; Wai Ming Kwok; Aleksandra B. Djurišić; Siu Fung Yu; D. L. Phillips; W. K. Chan

doi:10.1016/j.optmat.2008.01.002

Lasing threshold dependence on excitation pulse duration in ZnO tetrapods

Y. F. Hsu, E. S.P. Leong, Wai Ming Kwok, Aleksandra B. Djurišić, Siu Fung Yu, D. L. Phillips, W. K. Chan

Research output: Journal article publication › Journal article › Academic research › peer-review

8 Citations (Scopus)

Abstract

The dependence of the stimulated emission from ZnO tetrapods on the excitation pulse duration was studied. In all cases, clear lasing modes with a width of 0.5-0.8 nm were observed. However, lasing thresholds were significantly different. The thresholds observed were 57 μJ/cm2, 840 μJ/cm2, and 4.2 mJ/cm2for 250 fs, 120 ps, and 6 ns excitation pulses, respectively. The same trends (a decrease of lasing threshold with a decrease of pulse duration) are observed in samples with different tetrapod densities, although the differences become less pronounced in higher tetrapod density samples where lasing from multiple tetrapods can occur.

Original language	English
Pages (from-to)	35-38
Number of pages	4
Journal	Optical Materials
Volume	31
Issue number	1
DOIs	https://doi.org/10.1016/j.optmat.2008.01.002
Publication status	Published - 1 Sept 2008
Externally published	Yes

Keywords

Lasing
Tetrapod
ZnO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Computer Science
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

More information

10.1016/j.optmat.2008.01.002

Cite this

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title = "Lasing threshold dependence on excitation pulse duration in ZnO tetrapods",

abstract = "The dependence of the stimulated emission from ZnO tetrapods on the excitation pulse duration was studied. In all cases, clear lasing modes with a width of 0.5-0.8 nm were observed. However, lasing thresholds were significantly different. The thresholds observed were 57 μJ/cm2, 840 μJ/cm2, and 4.2 mJ/cm2for 250 fs, 120 ps, and 6 ns excitation pulses, respectively. The same trends (a decrease of lasing threshold with a decrease of pulse duration) are observed in samples with different tetrapod densities, although the differences become less pronounced in higher tetrapod density samples where lasing from multiple tetrapods can occur.",

keywords = "Lasing, Tetrapod, ZnO",

author = "Hsu, {Y. F.} and Leong, {E. S.P.} and Kwok, {Wai Ming} and Djuri{\v s}i{\'c}, {Aleksandra B.} and Yu, {Siu Fung} and Phillips, {D. L.} and Chan, {W. K.}",

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doi = "10.1016/j.optmat.2008.01.002",

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TY - JOUR

T1 - Lasing threshold dependence on excitation pulse duration in ZnO tetrapods

AU - Hsu, Y. F.

AU - Leong, E. S.P.

AU - Kwok, Wai Ming

AU - Djurišić, Aleksandra B.

AU - Yu, Siu Fung

AU - Phillips, D. L.

AU - Chan, W. K.

PY - 2008/9/1

Y1 - 2008/9/1

N2 - The dependence of the stimulated emission from ZnO tetrapods on the excitation pulse duration was studied. In all cases, clear lasing modes with a width of 0.5-0.8 nm were observed. However, lasing thresholds were significantly different. The thresholds observed were 57 μJ/cm2, 840 μJ/cm2, and 4.2 mJ/cm2for 250 fs, 120 ps, and 6 ns excitation pulses, respectively. The same trends (a decrease of lasing threshold with a decrease of pulse duration) are observed in samples with different tetrapod densities, although the differences become less pronounced in higher tetrapod density samples where lasing from multiple tetrapods can occur.

AB - The dependence of the stimulated emission from ZnO tetrapods on the excitation pulse duration was studied. In all cases, clear lasing modes with a width of 0.5-0.8 nm were observed. However, lasing thresholds were significantly different. The thresholds observed were 57 μJ/cm2, 840 μJ/cm2, and 4.2 mJ/cm2for 250 fs, 120 ps, and 6 ns excitation pulses, respectively. The same trends (a decrease of lasing threshold with a decrease of pulse duration) are observed in samples with different tetrapod densities, although the differences become less pronounced in higher tetrapod density samples where lasing from multiple tetrapods can occur.

KW - Lasing

KW - Tetrapod

KW - ZnO

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U2 - 10.1016/j.optmat.2008.01.002

DO - 10.1016/j.optmat.2008.01.002

M3 - Journal article

SN - 0925-3467

VL - 31

SP - 35

EP - 38

JO - Optical Materials

JF - Optical Materials

IS - 1

ER -

Lasing threshold dependence on excitation pulse duration in ZnO tetrapods

Abstract

Keywords

ASJC Scopus subject areas

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