SEUNG-WAN KANG, RAN HEE KIM, JOO YEON KIM, YOICHIRO IWASE, KENJI KAMADA AND KWANG-SUP LEE

Theefficient two-photon absorbing ethynylenephenylene (EPS)derivatives symmetrically coupled with carbazoles (Cz-EPS-Cz) or triphenylamines (TP-EPS-TP) at both ends of molecules were synthesized. TPA cross-sections of the resulting chromophores measured by femtosecond open aperture Z-scan method were found to be 1070 GM at 675 nm for Cz-EPS-Cz and 1260 GM at 700nm for TP-EPS-TP, respectively. By using these TPA chromophores as a photosensitizer, we have successfully fabricated micro-patterns via TPA-induced polymerization under low laser power and short exposure time.