1. Double fitting of Maker fringes to characterize near-surface and bulk second-order nonlinearities in poled silica
- Author
-
Qiu, Mingxin, Vilaseca, Ramon, Botey, Muriel, Sellarès, Jordi, Pi, F., Orriols Tubella, Gaspar, and American Physical Society
- Subjects
Surface (mathematics) ,Materials science ,Optical glass ,Physics and Astronomy (miscellaneous) ,Condensed matter physics ,business.industry ,Surface patterning ,Fringe analysis ,Poling ,Order (ring theory) ,Silica ,Surface structure ,Signal on ,Anode ,Nonlinear system ,Distribution (mathematics) ,Optics ,business - Abstract
An experimental analysis of the distribution and thickness of the bulk nonlinearity induced in poled silica is reported. The second-order susceptibility decreases exponentially from the anodic interface. Maker fringe patterns showing a double structure are interpreted in relation to the presence of two nonlinear profiles, one concentrated near the anodic surface and another extending into the bulk of the sample. The Maker fringe theory is properly generalized and a double fitting technique reproducing well the experimental results is used to characterize the induced nonlinearities. The dependence of the second-harmonic signal on the poling temperature is given, which is different from that of sol-gel silica.
- Published
- 2000