Ultrafast third-order optical nonlinearities of vertically-aligned ZnO nanorods

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Vertically-aligned ZnO nanorods with different rod diameters of 50 nm, 110 nm and 240 nm were synthesized by a low-temperature wet-chemical method. Morphologies and structures of ZnO nanorods were examined by scanning electron microscopy and X-ray diffraction. Third-order optical nonlinearities such as nonlinear refraction and absorption were determined by closed- and open-aperture z-scan measurements at 815 nm using femtosecond laser pulses. Enhanced optical nonlinearities were observed with increasing rod diameters and aligned degrees of ZnO nanorods along the c-axis. Nonlinear response time, measured by using a time-resolved optical Kerr-gate technique, was less than 95 fs. (c) 2007 Elsevier B.V. All rights reserved
Publisher
ELSEVIER SCIENCE BV
Issue Date
2007-10
Language
English
Article Type
Article
Keywords

ABSORPTION-INDUCED LUMINESCENCE; ZINC-OXIDE; NANOPARTICLES; GENERATION; REFRACTION; NANOWIRES; ARRAYS; FILMS

Citation

CHEMICAL PHYSICS LETTERS, v.447, no.1-3, pp.86 - 90

ISSN
0009-2614
DOI
10.1016/j.cplett.2007.08.086
URI
http://hdl.handle.net/10203/212765
Appears in Collection
PH-Journal Papers(저널논문)
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