Nonlinear Talbot self-healing in periodically poled LiNbO_3 crystal [Invited]  

作　　者：Bingxia Wang Shan Liu Tianxiang Xu Ruwei Zhao Peixiang Lu Wieslaw Krolikowski Yan Sheng 王炳霞;刘山;徐天翔;赵茹薇;陆培祥;Wieslaw Krolikowski;盛艳(Laboratory of Infrared Materials and Devices,Research Institute of Advanced Technologies,Ningbo University,Ningbo 315211,China;Wuhan National Laboratory for Optoelectronics and School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China;Laser Physics Center,Research School of Physics,Australian National University,Canberra,ACT 2601,Australia;Science Program,Texas A&M University at Qatar,Doha 23874,Qatar)

机构地区：[1]Laboratory of Infrared Materials and Devices,Research Institute of Advanced Technologies,Ningbo University,Ningbo 315211,China [2]Wuhan National Laboratory for Optoelectronics and School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China [3]Laser Physics Center,Research School of Physics,Australian National University,Canberra,ACT 2601,Australia [4]Science Program,Texas A&M University at Qatar,Doha 23874,Qatar

出　　处：《Chinese Optics Letters》2021年第6期50-53,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61905124,11974196,and 61905125);the Australian Research Council(No.DP19010774);the Qatar National Research Fund(No.NPRP 12S-0205190047);the Yongjiang Scholar Foundation of Ningbo;the K.C.Wong Magna Fund of Ningbo University。

摘　　要：The nonlinear Talbot effect is a near-field nonlinear diffraction phenomenon in which the self-imaging of periodic objects is formed by the second harmonics of the incident laser beam. We demonstrate the first, to the best of our knowledge, example of nonlinear Talbot self-healing, i.e., the capability of creating defect-free images from faulty nonlinear optical structures. In particular, we employ the tightly focused femtosecond infrared optical pulses to fabricate LiNbO_(3) nonlinear photonic crystals and show that the defects in the form of the missing points of two-dimensional square and hexagonal periodic structures are restored in the second harmonic images at the first nonlinear Talbot plane. The observed nonlinear Talbot self-healing opens up new possibilities for defect-tolerant optical lithography and printing.

关 键 词：nonlinear Talbot effect nonlinear photonic crystal periodically poled LiNbO_(3) second harmonic generation SELF-HEALING 

分 类 号：O734[理学—晶体学]