High-Efficiency Spatial-Wave Frequency Multiplication Using Strongly Nonlinear Metasurface.

ABSTRACT: In the past decades, metasurfaces have opened up a promising venue for manipulating lights and electromagnetic (EM) waves. In the field of nonlinearity, second-harmonic generation (SHG) is a research focus due to its diverse applications. There have been many researches for realizing SHG in optical regime using nonlinear characteristics of optical materials, but its efficiency is low. In microwave frequencies, SHGs are basically studied in the guided-wave systems. Here, high-efficiency SHGs of spatial waves are presented in the microwave frequency using nonlinear metasurface loaded with active chips at the subwavelength scale. The nonlinear meta-atom is composed of receiving antenna, transmitting antenna, and active circuit of frequency multiplier, which can realize strongly nonlinear resp

SUBMITTER: Wang HP 

PROVIDER: S-EPMC8456279 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature