Review: Controlling circularly-polarized emission and second-harmonic generation with artificial nanostructures

Symmetry of material plays a crucial role in the polarization sensitive optical phenomena; therefore it is important to employ well-designed artificial nanostructures for developing devices for polarization control. We have been developing methods of circularly polarized light generation using such artificial nanostrucutres. In this presentation, we show the recent progress of our study for controls of circularly polarized light emission from chiral photonic nanostrucutres and second-harmonic generation (SHG) with triangular metal hole arrays.