Deterministic nanoantenna array design for stable plasmon-enhanced harmonic generation.

ABSTRACT: Plasmonic nanoantennas have been extensively explored to boost nonlinear optical processes due to their capabilities to confine optical fields on the nanoscale. In harmonic generation, nanoantenna array architectures are often employed to increase the number of emitters in order to efficiently enhance the harmonic emission. A small laser focus spot on the nanoantenna array maximizes the harmonic yield since it scales nonlinearly with the incident laser intensity. However, the nonlinear yield of the nanoantennas lying at the boundary of a focused beam may exhibit significant deviations in comparison to those at the center of the beam due to the Gaussian intensity distribution of the beam. This spatial beam inhomogeneity can cause power instability of the emitted harmonics when the lateral b

SUBMITTER: Jeong TI 

PROVIDER: S-EPMC11501664 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature