An antiguide structure for enhanced second-harmonic generation was actively constructed in a photorefractive polymer by use of a pump beam. Irradiation of a pump beam enhanced second-harmonic power, and blocking the pump returned the power to the initial value. The electric-field dependence of the degree of enhancement of the second-harmonic power confirmed that the antiguide structure was constructed through a photorefractive-index change in the medium. The photorefractive-index change accompanied molecular reorientation induced by the pump-generated space charges. The thermo-optic effect on formation of the structure is also discussed.
© 2001 Optical Society of AmericaFull Article | PDF Article
Koen Clays, Nancy J. Armstrong, and Thomas L. Penner
J. Opt. Soc. Am. B 10(5) 886-893 (1993)
Koen Clays, Jay S. Schildkraut, and David J. Williams
J. Opt. Soc. Am. B 11(4) 655-664 (1994)
X. T. Tao, T. Watanabe, D. C. Zou, H. Ukuda, and S. Miyata
J. Opt. Soc. Am. B 12(9) 1581-1585 (1995)