Abstract
We present results of high-intensity measurements of the two-beam coupling gain coefficient and the photorefractive grating response time in barium titanate (BaTiO3). For hole-dominated BaTiO3 the gain coefficient is observed to decrease with intensity in the megawatt-per-square-centimeter range, because of intensity-dependent photocarrier competition, and is also seen to reverse signs above a critical intensity determined by the crystal doping. Significant two-beam coupling is observed to develop transiently during a single pulse of 15-ns duration. An analytical theory, valid at high intensity, is developed that includes the effects of simultaneous electron and hole photoconductivities and carrier saturation. The analysis predicts the experimentally observed strong intensity dependence in the two-beam coupling gain coefficient, including its reversal in sign.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
