Nonlinear Interference and Tailorable Third-Harmonic Generation from Dielectric Oligomers

作者：Shcherbakov Maxim R^*; Shorokhov Alexander S; Neshev Dragomir N; Hopkins Ben; Staude Isabelle; Melik Gaykazyan Elizaveta V; Ezhov Alexander A; Miroshnichenko Andrey E; Brener Igal; Fedyanin Andrey A; Kivshar Yuri S

来源：ACS Photonics, 2015, 2(5): 578-582.

DOI：10.1021/acsphotonics.5b00065

• nonlinear optics
• third-harmonic generation
• silicon nanoparticles
• nanoparticle oligomers
• optical magnetism
• Mie scattering

It is known that the nonlinear optical properties of photonic nanostructures can be modified substantially due to strong field confinement and optical resonances. In this contribution, we study third-harmonic generation from low-loss subwavelength silicon nanodisks arranged in the form of trimer oligomers with varying distance between the nano-particles. Each of the nanodisks exhibits both electric and magnetic Mie-type resonances that are shown to affect significantly the nonlinear response. We observe the third-harmonic radiation intensity that is comparable to that of a bulk silicon slab and demonstrate a pronounced reshaping of the third-harmonic spectra due to interference of the nonlinearly generated waves augmented by an interplay between the electric and the magnetic dipolar resonances.

• 出版日期2015-5