한국광학회:학술대회논문집 (Proceedings of the Optical Society of Korea Conference)

한국광학회 (Optical Society of Korea)
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Nonlinear Absorption in Dithienothiophene-based Chromophores

  • Park, H. (Department of Physics/Research Center for Dielectric and advanced Matter Physics, Pusan National University) ;
  • Kim, H. (Department of Physics/Research Center for Dielectric and advanced Matter Physics, Pusan National Universit) ;
  • E. Kang (Department of Physics/Research Center for Dielectric and advanced Matter Physics, Pusan National Universit) ;
  • Lee, J. (Department of Polymer Science ＆ Engineering, Hannam Universit) ;
  • Lee, K. (Department of Polymer Science ＆ Engineering, Hannam Universit) ;
  • M. Cha (Department of Physics/Research Center for Dielectric and advanced Matter Physics, Pusan National University)
  • 발행 : 2000.08.01
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초록

There has recently been a considerable amount of interest in two-photon(TP) processes because of their applications to 3-D optical data storage and imaging, up-conversion lasing, and optical power limiting. Recently, the role of Dithienothlophene(DTT) as $\pi$-center of two-photon absorption(TPA) molecules was reported to give a large enhancement of TPA, compared with the benzeniods counterparts.$^{[1]}$ In this report, we carried out two experiments to investigate nonlinear optical absorption of the molecules in which central DTT is attached through conjugation to either a D/D or a D/A pair at the ends, forming a D-$\pi$-D(1 and 3) or D-$\pi$-A(2 and 4) sequence(Fig.1). All the samples were prepared in solutions with the same molar concentration. (omitted)

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