Abstract： Ultrafast relaxation processes and transient two-photon absorption are studied in a novel porphyrin side-chain polymer, 5-hydroxy-10,15,20-triphenyl-porphyrin-poly(glycidyl methacrylate) (HTPP-PGMA), by using picosecond luminescence spectroscopy and femtosecond pump--probe techniques. HTPP-PGMA exhibits the ultrafast initial luminescence decay (～300ps), which is absent in the conventional porphyrin monomer such as TPP. Enhanced two-photon absorption was observed in HTPP-PGMA; the corresponding Im x(3) is about 2.8× 1011esu, which is almost one order of magnitude larger than that of the conventional porphyrin monomer (TPP) (～1.3×1012esu). The ultrafast energy transfer plays an important role in the excited-state relaxation dynamics observed in HTPP-PGMA. The potential application of HTPP-PGMA in optical switching is discussed.
WANG Hui;HUANG Ya-Ping;DENG Li;ZHAO Fu-Li;LIN Wei-Zhu;WANG Jian;LIANG Zhao-Xi. Ultrafast Energy Transfer and Enhanced Two-Photon Absorption in a Novel Porphyrin Side-Chain Polymer[J]. 中国物理快报, 2004, 21(12): 2521-2524.
WANG Hui, HUANG Ya-Ping, DENG Li, ZHAO Fu-Li, LIN Wei-Zhu, WANG Jian, LIANG Zhao-Xi. Ultrafast Energy Transfer and Enhanced Two-Photon Absorption in a Novel Porphyrin Side-Chain Polymer. Chin. Phys. Lett., 2004, 21(12): 2521-2524.
2004, Vol. 21 
