X. L. Jiang, L. Li, J. Kumar, and S. K. Tripathy, "Large second harmonic generation with in-plane anistrophy induced by photoassisted poling in azobenzene containing polymer films,"
in Quantum Electronics and Laser Science Conference, R. Freeman and P. Corkum, eds.,
Vol. 10 of OSA Technical Digest
(Optical Society of America, 1996), paper JTuG6.