Journal
CHEMICAL PHYSICS LETTERS
Volume 449, Issue 1-3, Pages 77-81Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2007.10.034
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Three- and four-photon absorption induced processes of six new styrylpyridinium motif dyes are studied. Their largest 3-photon absorption cross-section is 29.9 times of Rhodamine 6G. Effective 3- and 4-photon absorption induced amplified spontaneous emissions are observed. The efficiency of 3-photon absorption induced lasing reaches 5.4%. Their large 3-photon absorption cross-sections mainly result from large conjugated plane and large dipole moment, and also relate to their counter ions. Their high efficiencies of 3-photon absorption induced lasing imply that 3-photon absorption process is possible to satisfy the conditions for practical applications. (c) 2007 Elsevier B.V. All rights reserved.
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