Laser-Like Emission From Highly Scattering ZnO Nanoparticle Films

Journal Article · Sun Sep 27 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3250111· OSTI ID:21322929

Stassinopoulos, A ^[1]; Tsagarakis, E D; Das, R N; Giannelis, E P ^[2]; Anastasiadis, S H; Anglos, D ^[1]

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1. Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O. Box 1385, 71110 Heraklion, Crete (Greece)
2. Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853 (United States)

A convenient and straightforward way to fabricate random lasing films based on ZnO is proposed. Highly scattering films consisting of ZnO nanoparticles are fabricated following a two-stage process that involves a) spin-coating of aqueous ZnO nanoparticle dispersions on rigid (glass) or flexible (polyethylene terephthalate) substrates and b) subsequent surface modification by means of a controlled UV laser annealing processing. Upon excitation with 150 picosecond pulses at 355 nm, the films exhibit intense photoluminescence emission, which upon crossing a threshold pump energy density, develops laser-like characteristics, namely, gain amplification, spectral narrowing and, under optimum pump conditions and sample structure, distinct lasing modes.

• OSTI ID: 21322929
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1172; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ANNEALING
ENERGY DENSITY
EXCITATION
FILMS
GAIN
LASER MATERIALS
LASER RADIATION
LINE NARROWING
NANOSTRUCTURES
OPTICAL PUMPING
PARTICLES
PHOTOLUMINESCENCE
SCANNING ELECTRON MICROSCOPY
SUBSTRATES
SURFACES
ULTRAVIOLET RADIATION
ZINC OXIDES