Photoassisted poling induced second harmonic generation with inhyphen;plane anisotropy in azobenzene containing polymer films

摘要

Photoassisted poling of azobenzene containing polymer films at room temperature using polarized Ar+laser beam as pump light was studied. Irradiating the films withphyphen;polarized pump light at an incident angle to the normal during the poling process, second harmonic generation with inhyphen;plane anisotropy could be induced. Second order nonlinear optical coefficient,d33, of the poled sample was measured to be 20 pm/V. The second harmonic generation properties induced by photoassisted poling and thermal assisted poling were compared. copy;1996 American Institute of Physics.