Abstract
CaCu3Ti4O12 (CCTO) thin films of preference (220) orientation are deposited on MgO(111) substrates using pulsed laser deposition method. The third-order optical nonlinearity of CCTO films was investigated using Z-scan technique at a wavelength of 532 nm with 25 ps duration pulses. The self-focusing behavior in CCTO films was observed, which is different from the traditional CCTO films grown on LaAlO3 (0001), MgO(100), and fused silica substrates of self-defocusing behavior. The third-order nonlinear refraction coefficient is determined of a value 0.76 cm2/GW, along with the fifth-order nonlinear refractive index -0.2 cm4/GW2, the nonlinear absorption coefficient -1.87 × 10−7 m/W and saturable absorption intensity 1.72 GW/cm2. The structure-changed nonlinear refraction and fast response at picosecond time-domain extend the potential applications of CaCu3Ti4O12 thin films for nonlinear photonics devices.
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.
