在线阅读 --自然科学版 2014年1期《自散焦晶体中空间二次谐波的产生机理》
自散焦晶体中空间二次谐波的产生机理--[在线阅读]
王龙飞, 杨立森, 武一洁, 李永辉, 逯文婷
内蒙古师范大学 物理与电子信息学院, 内蒙古 呼和浩特 010022
起止页码: 36--41页
DOI: 10.11826/j.issn.1000-5854.2014.01.008
摘要
在掺Fe浓度为0.025%,厚度为1.06mm的自散焦LiNbO3∶Fe晶体中发现了阵列光束与写入晶格相互作用,表现为双光束、3光束、4光束和6光束全部发生光斑分裂.通过对一维和二维光子晶体的二次谐波现象的理论计算,证明了空间二次谐波是产生光斑分裂的原因,并且发现满足相位匹配条件能够提高二次谐波的产生效率.

On Spacial Second-harmonic Generating Mechanism in Self-defocus Photorefractive Crystal
WANG Longfei, YANG Lisen, WU Yijie, LI Yonghui, LU Wenting
Department of Physics and Electronic Information, Inner Mongolia Normal University, Inner Mongolia Hohhot 010022, China
Abstract:
The LiNbO3:Fe is a self-defocus crystal in which the concentration of Fe is 0.025% and its thickness is 1.06mm.The phenomenon of array beam interacting with photonic lattices fabricated was spotted in LiNbO3:Fe photonic crystal.Light spot division was observed in Dual, three, four and six-beams of light.The light spot division is due to the spatial second-harmonic proved by the theoretical calculation of the second-harmonic.As for the second-harmonic generation, we show that the efficiency of the second-harmonic generation can be greatly enhanced if the phase match condition is met.

收稿日期: 2013-6-13
基金项目: 国家自然科学基金(60467002);内蒙古自治区自然科学基金(2013MS0926)

参考文献:
[1]SHEN Y R.The Principles of Nonlinear Optics [M].New York:Wiley,1984.
[2]YABLONOVITCH E.Inhibited Spontaneous Emission in Solid-state Physics and Electronics [J].Phys Rev Lett,1987,58(20):2059-2061.
[3]JOHN S.Strong Localization of Photons in Certain Disordered Dielectric Super Lattices [J].Phys Rev Lett,1987,58(23):2486-2489.
[4]PERTSCH T,ZENTGRAF T,PESCHEL U,et al.Anomalous Refraction and Diffraction in Discrete Optical Systems [J].Phys Rev Lett,2002,88:093901-1-4.
[5]JASON W F,TAL C,MORDECHAI S.Observation of Discrete Solitons in Optically Induced Real Time Waveguide Arrays [J].Phys Rev Lett,2003,90:023902-1-4.
[6]MORANDOTTI R,EISENBERG H S,SILBERBERG Y.Self-focusing and Defocusing in Waveguide Arrays [J].Phys Rev Lett,2001,86:3296-3299.
[7]杨立森,陈玉和,陆改玲,等.光折变光子晶格中空间二次谐波的产生 [J].物理学报,2007,56(7):3966-3971.
[8]陈玉和,杨立森,陆改玲,等.自散焦晶体中阵列光束与写入晶格的相互作用研究 [J].内蒙古师范大学学报:自然科学汉文版,2007,36(2):145-149.
[9]姚启均.光学教程 [M].北京:高等教育出版社,2002:16-17.
[10]邓开发.光子晶体的非线性光学特性研究 [D].武汉:华中科技大学,2004.