Enhanced nonlinear tunability and bistable response in an all-dielectric metamaterial

The coupling between closely spaced resonators as well as the resonant characteristics of metamaterials can effectively enhance the local fields, which can be employed for essential enhancement of nonlinear electromagnetic or optical resonance. Here, we demonstrate experimentally that the reinforced local field intensity can effectively enhance the nonlinear effect considering the coupling of a metamaterial made of asymmetric and nonlinear ceramic structure. Bistable behavior on the transmission is also demonstrated by modulating the input power. This study is promising for tunable meta-devices in practical applications considering the enhanced nonlinear light-matter interactions in dielectric metamaterials.