title: Quasi-phase-matched second-harmonic Talbot self-imaging in a 2D periodically-poled LiTaO3 crystal.
abstract: We demonstrate the improved second-harmonic Talbot self-imaging through the quasi-phase-matching technique in a 2D periodically-poled LiTaO(3) crystal. The domain structure not only composes a nonlinear optical grating which is necessary to realize nonlinear Talbot self-imaging, but also provides reciprocal vectors to satisfy the phase-matching condition for second-harmonic generation. Our experimental results show that quasi-phase-matching can improve the intensity of the second-harmonic Talbot self-imaging by a factor of 21.
authors.affiliation: National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and School of Physics, Nanjing University, Nanjing 210093, China.
authors.forename: Dongmei
authors.initials: D
authors.lastname: Liu
authors.forename: Dunzhao
authors.initials: D
authors.lastname: Wei
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jiong
authors.initials: J
authors.lastname: Zou
authors.forename: X P
authors.initials: XP
authors.lastname: Hu
authors.forename: S N
authors.initials: SN
authors.lastname: Zhu
authors.forename: Min
authors.initials: M
authors.lastname: Xiao
mesh_terms: D008027:Light; D008094:Lithium / Q000737:chemistry* / Q000528:radiation effects*; D008422:Materials Testing; D010087:Oxides / Q000737:chemistry* / Q000528:radiation effects*; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation; D013635:Tantalum / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D010087:Oxides; C473347:lithium tantalate oxide; D013635:Tantalum; D008094:Lithium