In this chapter, we limit our discussion to nonlinear plasmonic metasurfaces and focus on recent progress in nonlinear plasmonic metasurfaces for manipulating second harmonic generation signals. We start with the discussion of selection rules of nonlinear harmonic generation for a circularly polarized incident fundamental beam. We then proceed with the different approaches for achieving phase control in a nonlinear metasurface and the various devices based on this effect. We further discuss the nonlinear chiral effect in a metasurface with planar chirality. Finally, we conclude and give an outlook on future directions.

Chapter Contents:

• 8.1 Introduction
• 8.2 Selection rule in harmonic generations for circular polarizations
• 8.3 Binary phase nonlinear metasurfaces
• 8.3.1 Continuous control of nonlinearity phase
• 8.4 Nonlinear metasurface holography
• 8.5 Nonlinear metasurface for intensity control and image encoding
• 8.6 Vortex beam generation in harmonic generation
• 8.7 Nonlinear imaging
• 8.8 Nonlinear planar chiral metasurfaces
• 8.9 Summary and outlook
• References

Inspec keywords: plasmonics; optical harmonic generation; light polarisation; optical metamaterials; optical control; chirality

Other keywords: second harmonic generation signals; circularly polarized incident fundamental beam; nonlinear chiral effect; planar chirality; nonlinear plasmonic metasurface; phase control

Subjects: Optical harmonic generation, frequency conversion, parametric oscillation and amplification; Nanophotonic devices and technology; Control of optical systems; Optical materials; Optical polarization; Optical harmonic generation, frequency conversion, parametric oscillation and amplification; Optical metamaterials; Nanophotonic devices and technology