Second-harmonic generation by Cerenkov-type phase matching in a poled polymer waveguide - Sugihara, O.; Kunioka, S.; Nonaka, Y.; Aizawa, R.; Koike, Y.; Kinoshita, T.; Sasaki, K. (American Institute of Physics (AIP), 1991)
http://dx.doi.org/10.1063/1.349770
Keywords: U