Abstract
Plasmonic nanostructures have been considered as potential candidates for enhancing the nonlinear upconversion rate at nanoscale levels due to their strong near-field enhancement. Here, we propose a Fano-resonance-based mode-matching hybrid metasurface that combines the advantages of Fano resonances and mode-matching for boosting second-harmonic conversion. A confined and strong near-field intensity is generated by gold nanoantennas within the volume of polycrystalline zinc sulfide nanoparticles, thus resulting in a larger effective second-harmonic coefficient. The combination of the abovementioned features allows for the realization of a second-harmonic generation (SHG) conversion efficiency of , and the SHG signal is twice that obtained with dipole hybrid metasurfaces. Our designed metasurface may pave the way for optimizing nonlinear light-matter interactions at the nanoscale.
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
Fajun Xiao, Shiyin Cao, Wuyun Shang, Weiren Zhu, Lei Han, Ting Mei, Malin Premaratne, and Jianlin Zhao
Opt. Lett. 44(15) 3813-3816 (2019)
L. Ghirardini, L. Carletti, V. Gili, G. Pellegrini, L. Duò, M. Finazzi, D. Rocco, A. Locatelli, C. De Angelis, I. Favero, M. Ravaro, G. Leo, A. Lemaître, and M. Celebrano
Opt. Lett. 42(3) 559-562 (2017)
Yiwen Liu, Lili Gui, and Kun Xu
Opt. Express 30(23) 42440-42453 (2022)