In this paper, we will discuss an advanced application of metasurfaces, the generation, enhancement, and control of nonlinear signal via nonlinear metasurfaces. We will introduce the computational methods for nanophotonic metasurfaces, focusing in particular on the approaches for the simulation of nonlinear processes.

Chapter Contents:

• 4.1 Introduction
• 4.2 Non-linear metasurfaces
• 4.3 Non-linear simulations
• 4.3.1 General considerations for a non-linear simulation
• 4.3.2 Two-step approach
• 4.3.3 Direct non-linear generation approach
• 4.4 Examples
• 4.4.1 Enhancement of second-order non-linear processes
• 4.4.2 Understanding non-linear emission in hybrid nanostructures
• 4.4.3 Vectorial control of third-order non-linear emission
• 4.5 Conclusions
• Acknowledgements
• References

Inspec keywords: nonlinear optics; nanophotonics

Other keywords: nonlinear signal control; nanophotonic nonlinear metasurfaces; nonlinear signal generation; nonlinear signal enhancement; computational methods

Subjects: Nanophotonic devices and technology; Nanophotonic devices and technology; Nonlinear optics; Nonlinear optics and devices