Switchable nonlinear metalloferroelectric photonic crystals

Abstract

Two types of low-voltage electroswitchable nonlinear photonic crystals were fabricated providing spatial-frequency control of second harmonic generation radiation of visible light. A two-dimensional photonic crystal was fabricated by focused ion beam etching of a ferroelectric BaSrTi O3 thin film and switched by an electric field applied by an interdigital electrode system, which simultaneously acted as a one-dimensional photonic crystal. The fabricated device operated at a second harmonic wavelength around 400 nm with an efficiency incomparably higher than in the case of linear optics. © 2007 American Institute of Physics.