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- Title
Optical limiting properties and ultrafast response of three oligomers based on 1,3,5-triazine.
- Authors
Wang, Yaochuan; Wang, Yizhuo; Wang, Guiqiu; Liu, Dajun
- Abstract
Three tri-branched oligomers based on 1,3,5-triazine with large two-photon absorption cross-sections and good optical limiting properties were investigated by UV–Visible, femtosecond Z-scan and one/two-color pump-probe measurements. The two-photon absorption cross-section results measured at a wavelength of 800 nm were found decreasing with the number of fluorene groups in each branches. The optical limiting properties were also investigated and a two-photon absorption mechanism was proposed. One/two-color pump-probe measurements were also used to further investigate the ultrafast responses of these tri-branched oligomers. The ultrafast response results indicated that after excitation, the tri-branched oligomers will first undergo a fast process to form an intramolecular charge transfer state followed by relaxation of the intramolecular charger transfer state of approximately several hundred ps.
- Subjects
OPTICAL limiting; OLIGOMERS; TRIAZINES; LIGHT absorption; FEMTOSECOND pulses
- Publication
Journal of Nonlinear Optical Physics & Materials, 2018, Vol 27, Issue 3, pN.PAG
- ISSN
0218-8635
- Publication type
Article
- DOI
10.1142/S0218863518500261