Nonlinear absorption processes in triphenylamine-dithienothiophene- triphenylamine

Haeyoung Choi, Kwanghee Lee, Myoungsik Cha, Jong Hyup Lee, Kwang Sup Lee, Oh Kil Kim, Han Young Woo

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We investigated the nonlinear absorption mechanism in the triphenylamlne-dithienothiophene-triphenylamine molecule by using laser pulses with two different pulse widths, 7 ns and 35 ps. The single-beam transmission measurement with a 7-ns pulse resulted in a larger nonlinear absorption than that with a 35-ps pulse and saturated at high input intensities due to the excited state absorption (ESA) initiated by two-photon absorption (TPA). For a quantitative characterization of the TPA and ESA contributions to the nonlinear absorption, we estimated the ESA spectrum and lifetime by using a pump-probe transmission measurement with a 35-ps pulse. A 5-level model was used to explain both the nonlinear absorption and the one-photon and the two-photon pumped fluorescence.

Original languageEnglish
Pages (from-to)887-891
Number of pages5
JournalJournal of the Korean Physical Society
Volume45
Issue number4
Publication statusPublished - 2004 Oct 1
Externally publishedYes

Fingerprint

photons
pulses
excitation
pulse duration
pumps
absorption spectra
life (durability)
fluorescence
probes
lasers
molecules

Keywords

  • Dithienothiophene
  • Excited-state absorption
  • Nonlinear absorption
  • Pump-probe experiment
  • Two-photon absorption

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Choi, H., Lee, K., Cha, M., Lee, J. H., Lee, K. S., Kim, O. K., & Woo, H. Y. (2004). Nonlinear absorption processes in triphenylamine-dithienothiophene- triphenylamine. Journal of the Korean Physical Society, 45(4), 887-891.

Nonlinear absorption processes in triphenylamine-dithienothiophene- triphenylamine. / Choi, Haeyoung; Lee, Kwanghee; Cha, Myoungsik; Lee, Jong Hyup; Lee, Kwang Sup; Kim, Oh Kil; Woo, Han Young.

In: Journal of the Korean Physical Society, Vol. 45, No. 4, 01.10.2004, p. 887-891.

Research output: Contribution to journalArticle

Choi, H, Lee, K, Cha, M, Lee, JH, Lee, KS, Kim, OK & Woo, HY 2004, 'Nonlinear absorption processes in triphenylamine-dithienothiophene- triphenylamine', Journal of the Korean Physical Society, vol. 45, no. 4, pp. 887-891.
Choi H, Lee K, Cha M, Lee JH, Lee KS, Kim OK et al. Nonlinear absorption processes in triphenylamine-dithienothiophene- triphenylamine. Journal of the Korean Physical Society. 2004 Oct 1;45(4):887-891.
Choi, Haeyoung ; Lee, Kwanghee ; Cha, Myoungsik ; Lee, Jong Hyup ; Lee, Kwang Sup ; Kim, Oh Kil ; Woo, Han Young. / Nonlinear absorption processes in triphenylamine-dithienothiophene- triphenylamine. In: Journal of the Korean Physical Society. 2004 ; Vol. 45, No. 4. pp. 887-891.
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