2 research outputs found
Tuning the Nonlinear Response of Coupled Split-Ring Resonators
We introduce the concept of controlling the nonlinear response of the
metamaterial by altering its internal structure. We experimentally demonstrate
tuning of the nonlinear response of two coupled split-ring resonators by
changing their mutual position. This effect is achieved through modification of
the structure of the coupled resonant modes, and their interaction with the
incident field. By offsetting the resonators we control the maximum currents
through the nonlinear driving elements, which affects the nonlinear response of
the system.We acknowledge a financial support from the Australian
Research Council
Nonlinear Metamaterials
Metamaterials are engineered structures designed to exhibit exotic electromagnetic properties. Early on in the development of metamaterials, these properties were extended to exotic regimes of nonlinear behaviour, unknown in classical nonlinear optics. In this chapter, we give a historical overview of metamaterials, considering first their exotic linear properties, and show how these give rise to exotic nonlinear properties, at frequency ranges from RF to visible. We overview the main attractive features of metamaterials for nonlinear applications, namely their strong local field enhancement, their ability to achieve exotic phase matching conditions, and the possibility to create inclusions with the correct symmetry to enhance a chosen nonlinear process. We then summarise the two most important classes of nonlinear optical metamaterials, plasmonic and all-dielectric