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Random Lasers Based on Organic-Inorganic Hybrids

Published online by Cambridge University Press:  01 February 2011

E.P. Giannelis ,
A. Stasinopoulos ,
M. Psyllaki ,
G. Zacharakis ,
R. N. Das ,
D. Anglos ,
S.H. Anastasiadis  and
R.A. Vaia
E.P. Giannelis
Affiliation:
Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, 711 10 Heraklion Crete, GREECE Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853
A. Stasinopoulos
Affiliation:
Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, 711 10 Heraklion Crete, GREECE Department of Physics, University of Crete, 711 10 Heraklion Crete, GREECE
M. Psyllaki
Affiliation:
Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, 711 10 Heraklion Crete, GREECE Department of Physics, University of Crete, 711 10 Heraklion Crete, GREECE
G. Zacharakis
Affiliation:
Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, 711 10 Heraklion Crete, GREECE
R. N. Das
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853
D. Anglos
Affiliation:
Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, 711 10 Heraklion Crete, GREECE
S.H. Anastasiadis
Affiliation:
Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, 711 10 Heraklion Crete, GREECE Department of Physics, University of Crete, 711 10 Heraklion Crete, GREECE
R.A. Vaia
Affiliation:
AFRL/MLBP, WPAFB, OH
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Abstract

Laser action is demonstrated in organic/inorganic nanocomposites consisting of pristine and surface-modified ZnO nanoparticles dispersed in an optically inert polymer matrix. The semiconductor particles feature simultaneously gain behavior and strong scattering ability, whereas the polymer matrix provides better processability and mechanical robustness. When excited by a laser pulse of appropriately short duration (pico- to nanoseconds), the composites give off fluorescence emission, which is strongly amplified as a result of light trapping due to multiple scattering. This laser action is manifested as a dramatic increase in the emitted light intensity accompanied by a significant spectral and temporal narrowing above a threshold value of the pumping laser intensity. Applications may include brighter flat-panel displays, inexpensive lasers for communications, military countermeasures, and lasers for search and rescue operations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 726: Symposium Q – Hybrid Organic-Inorganic Materials , 2002 , Q2.1
Copyright
Copyright © Materials Research Society 2002

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