Enhanced Third-Harmonic Generation in Silicon Nanoparticles Driven by Magnetic Response
详细信息 查看全文
- 作者：Maxim R. Shcherbakov ; Dragomir N. Neshev ; Ben Hopkins ; Alexander S. Shorokhov ; Isabelle Staude ; Elizaveta V. Melik-Gaykazyan ; Manuel Decker ; Alexander A. Ezhov ; Andrey E. Miroshnichenko ; Igal Brener ; Andrey A. Fedyanin ; Yuri S. Kivshar
- 刊名：Nano Letters
- 出版年：2014
- 出版时间：November 12, 2014
- 年：2014
- 卷：14
- 期：11
- 页码：6488-6492
- 全文大小：261K
- ISSN：1530-6992
文摘
We observe enhanced third-harmonic generation from silicon nanodisks exhibiting both electric and magnetic dipolar resonances. Experimental characterization of the nonlinear optical response through third-harmonic microscopy and spectroscopy reveals that the third-harmonic generation is significantly enhanced in the vicinity of the magnetic dipole resonances. The field localization at the magnetic resonance results in two orders of magnitude enhancement of the harmonic intensity with respect to unstructured bulk silicon with the conversion efficiency limited only by the two-photon absorption in the substrate.