期刊
CHEMICAL PHYSICS LETTERS
卷 435, 期 1-3, 页码 65-68出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2006.12.057
关键词
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Nonlinear optical (NLO) absorption of a metal dithiolene complex, [(C2H5)(4)N][Ni(dmit)(2)] has been studied by open-aperture (OA) Z-scan technique under irradiation with 15 ns and 1 ns laser pulses at 1053 nm and 40 ps laser pulses at 1064 nm. Distinct excited-state absorption behaviors were observed: a reverse saturable absorption (RSA) for 15 ns while a saturable absorption (SA) for I ns and 40 ps laser pulses, and the SA for I ns laser pulses was stronger than that for the latter. The mechanism responsible for the results with different laser pulses is analyzed using a five energy-level diagram. (c) 2006 Elsevier B.V. All rights reserved.
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