渔网超材料中三阶光学非线性的超快控制

Ultrafast control of third-order optical nonlinearities in fishnet metamaterials.

作者信息

Shorokhov Alexander S, Okhlopkov Kirill I, Reinhold Jörg, Helgert Christian, Shcherbakov Maxim R, Pertsch Thomas, Fedyanin Andrey A

机构信息

Lomonosov Moscow State University, Faculty of Physics, Moscow, 119991, Russia.

Friedrich Schiller University Jena, Institute of Applied Physics, Abbe Center of Photonics, Jena, 07743, Germany.

出版信息

Sci Rep. 2016 Jun 23;6:28440. doi: 10.1038/srep28440.

DOI:10.1038/srep28440

PMID:27335268

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4917860/

Abstract

Nonlinear photonic nanostructures that allow efficient all-optical switching are considered to be a prospective platform for novel building blocks in photonics. We performed time-resolved measurements of the photoinduced transient third-order nonlinear optical response of a fishnet metamaterial. The mutual influence of two non-collinear pulses exciting the magnetic resonance of the metamaterial was probed by detecting the third-harmonic radiation as a function of the time delay between pulses. Subpicosecond-scale dynamics of the metamaterial's χ((3)) was observed; the all-optical χ((3)) modulation depth was found to be approximately 70% at a pump fluence of only 20 μJ/cm(2).

摘要

能够实现高效全光开关的非线性光子纳米结构被认为是光子学中新型构建模块的一个有前景的平台。我们对一种渔网超材料的光致瞬态三阶非线性光学响应进行了时间分辨测量。通过检测作为脉冲间时间延迟函数的三次谐波辐射，研究了激发超材料磁共振的两个非共线脉冲的相互影响。观察到了超材料χ((3))的亚皮秒级动力学；在仅20 μJ/cm(2)的泵浦通量下，全光χ((3))调制深度约为70%。