Enhanced second-harmonic generation from nonlinear optical metamagnetics
Enhanced second-harmonic generation from nonlinear optical metamagnetics
复制标题
非线性光学元磁学的增强二次谐波产生
DOI：
10.1364/oe.22.026613
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发表时间：
2014-11-03
期刊：
影响因子：
3.8
通讯作者：
Xiao, Shumin
中科院分区：
文献类型：
--
作者：
Sun, Shang;Yi, Ningbo;Xiao, Shumin
对非线性磁性超材料的二次谐波产生过程进行了数值模拟。通过在磁性超材料的高局域区插入一种二阶非线性材料，它由成对的银条组成的周期阵列组成，倍频转换效率显著提高了近四个数量级。相应的场型和对倍频与非线性晶体对称性关系的进一步研究表明，转换效率的提高归因于结构的磁共振引起的局域场增强。我们的研究为进一步改善纳米结构的光学非线性提供了另一种途径。(C)2014年美国光学学会
We present a numerical simulation of second-harmonic generation (SHG) from a nonlinear magnetic metamaterial. By inserting a second-order nonlinear material in the high local field area of magnetic metamaterial, which consists of periodic arrays of paired thin silver strips, the convertion efficiency of SHG has been significantly enhanced by almost four orders of magnitude. The corresponding field patterns and further studies on dependance between SHG and symmetry of nonlinear crystal show that the increase of the conversion efficiency is attributed to the local field enhancement caused by the magnetic resonnance of the structure. Our researches provide an additional way to further improve the optical nonlinearity in nanostructures. (C) 2014 Optical Society of America