Synthesis and Characterization of Photonic Polyesters Containing Azo Chromophore in the Side Chain, Qiu Ling, Jiaxin Zhang, Jianfeng Zhai and Yuquan Shen, Polymer Journal, 1996, 28(12), 1027-1032. The off-resonant third-order optical nonlinearities of soluble vanadyl phthalocyanines, Qiu Ling and Shen Yuquan, Acta Chimica Sinica, 1997，55，37-41. Second-order Nonlinear Optical Properties of a Series of Polyester Containing Push-pull Azobenzene Chromophores in Their Side-chains, Shen Yuquan, Qiu Ling, Li Zhao, Zhang Xinxin, Zhai Jianfeng, J. A. Delaire, K. Nakatani and Y. Atassi, Journal of Materials Science, 1999, 34, 1513-1517.
