,Third-Order Optical Nonlinearity in Novel Porphyrin Dimers

• 作 者: PEI Song-Hao ZHAO Da-Peng ZHANG Wei ZHENG Wen-Qi WANG Xing-Qiao PENG Wei-Xian SHI Guang SONG Ying-Lin
• 机 构: Key Laboratory of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education, Jirm Uni
• 出 处: 中国物理快报（英文版）
• 发表日期: 2008年12期

We investigate the third-order optical nonlinearities in four novel porphyrin dimers (directs A to I)) and a monomeric porphyrin H2 CPTPP measured by using the single-beam z-scan technique with a pulsed Q-switched Nd:YAG nanosecond laser at 532nm.All the samples show strong excited state absorption (ESA) and high value of X(3) in the ns domain at this wavelength.We perform a comparison between dimer A and its monomer H2 CPTPP in their third-order optical nonlinearity, and discuss the relationships between the values of X(3) and the different bridging groups for all the dimers.