Fabrication of Pattern Poled Lithium Niobate Film and its Nonlinear Optical Applications

6th conference on Advances in Optoelectronics and Micro/nano-optics

Xu, M.^1 ; Wang, M.^1 ; Chen, Z.^1 ; Tang, J.^1 ; Shao, G.^1 ; Ming, Y.^1 ; Cui, G.^1 ; Lu, Y.^1

National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing

210093, China^1

关键词: Ferroelectric domains;    Fundamental wave;    Line-width resolutions;    Nonlinear diffraction;    Nonlinear optical applications;    Nonlinear wavefronts;    Optical vortex beam;    Physical phenomena;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/844/1/012008/pdf
DOI  :  10.1088/1742-6596/844/1/012008

来源: IOP

【 摘 要 】

We develop an approach to fabricate arbitrary ferroelectric domain patterns on lithium niobate film (30-50 μm thick) by applying a structured external field at room temperature. The fabricating method can be operated easily to reach 1 μm linewidth resolution. The ferroelectric domain inversion is stable and uniform. Nonlinear diffraction is generated when the fundamental wave pumps to film. Various nonlinear wavefronts are obtained such as the frequency converted optical vortex beam. A nonlinear holographic concept is proposed to explain the physical phenomena and guide the corresponding domain design. The applications in optical field manipulation and novel photonic states generation are discussed.