Properties of two-photon fluorescence and superradiance of a new organic dye C46H51N2B G. Zhou, D. Wang, S. Yang, Y. Ren, X. Xu, Z. Shao, X. Zhao, M. Jiang, Y. Tian, F. Hao et al. (2 more) Eur. Phys. J. D, 19 3 (2002) 389-393 Published online: 15 June 2002 DOI: 10.1140/epjd/e20020081