Enhancement of second-harmonic generation in nonlinear nanolaminate metamaterials by nanophotonic resonances

Hui Hsin Hsiao, Aimi Abass, Johannes Fischer, Rasoul Alaee, Andreas Wickberg, Martin Wegener, Carsten Rockstuhl

研究成果: 雜誌貢獻文章同行評審

8 引文 斯高帕斯(Scopus)

摘要

Nanolaminate metamaterials recently attracted a lot of attention as a novel second-order nonlinear material that can be used in integrated photonic circuits. Here, we explore theoretically and numerically the opportunity to enhance the nonlinear response from such nanolaminates by exploiting Fano resonances supported in grating-coupled waveguides. The enhancement factor of the radiated second harmonic signal compared to a flat nanolaminate can reach values as large as 35 for gold gratings and even 7000 for MgF2 gratings. For the MgF2 grating, extremely high-Q Fano resonances are excited in such all-dielectric system that result in strong local fields in the nonlinear waveguide layer to boost the nonlinear conversion. A significant portion of the nonlinear signal is also strongly coupled to a dark waveguide mode, which remains guided in the nanolaminate. The strong excitation of a dark mode at the second harmonic frequency provides a viable method for utilizing second-order nonlinearities for light generation and manipulation in integrated photonic circuits.
原文英語
頁(從 - 到)9651-9659
頁數9
期刊Optics Express
24
發行號9
DOIs
出版狀態已發佈 - 五月 2 2016
對外發佈Yes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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