Plasmonic nanostructure assisted HHG in NIR spectrum and thermal analysis

Ebadian, H.; Mohebbi, Masoud

doi:10.1088/1361-6463/aaa651

Cited by 6 publications

(1 citation statement)

References 26 publications

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“…Accompanied with the strong near-field enhancements caused by localized surface plasmon resonances (LSPRs), strong SHG emissions are observed with plasmonic nanostructures [8][9][10]. It has been shown that LSPRs of plasmonic nanostructures possess very small mode volumes, the surface contributions dominate for SHG, and there are inevitable nonradiative losses [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Second-harmonic generation with metal/dielectric/metal hybridized nanoantennas: enhanced efficiency, reduced mode volume and ideal magnetic/electric dipole scattering

Yang

Peng

et al. 2020

J. Phys. D: Appl. Phys.

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Although nonlinear optical responses with high refractive index dielectric nanostructures benefit from the large mode volume of the Mie resonances, it is an obstacle to achieve ultra-compact devices compared with plasmonic nanostructures. Besides that, the nonlinear emissions for dielectric nanoparticles often possess complex multipolar contributions, which is not favorable for nonlinear far-field manipulating such as beam steering. This study numerically demonstrates that with the formation of mode-matching condition, the efficiency of second-harmonic generation with an Au/AlGaAs/Au hybridized sandwich nanodisk can be enhanced by two orders compared with a same size AlGaAs nanoparticle, and the mode volume is reduced by about two orders at the same time. What is more interesting is that the nonlinear sources and far-field scattering are tailored by the hybridized resonances, where an ideal magnetic (or electric) dipole scattering around a broadband spectral range is observed for the second-harmonic generation, which provides a reliable way to generate pure magnetic light and to manipulate the nonlinear far-field emissions. The realization of enhanced nonlinear efficiency, the reduced mode volume, the background-free responses, and the ideal magnetic/electric dipole scattering make the sandwich hybridized nanoparticle a promising platform for nonlinear nanophotonics.

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