Nonlinear Photonic Quasicrystals for Novel Optical Devices

TL;DR

This paper introduces methods for designing nonlinear photonic quasicrystals that enable advanced optical functionalities like polarization switching and multi-wavelength frequency doubling, surpassing traditional periodic structures.

Contribution

It demonstrates the use of dual grid and cut-and-project methods to design complex nonlinear photonic quasicrystals for versatile optical applications.

Findings

Efficient design of 1D and 2D nonlinear photonic quasicrystals.

Successful implementation of multi-process optical devices.

Enhanced flexibility over periodic nonlinear photonic crystals.

Abstract

Two well-known methods for the design of quasicrystal models are used to create novel nonlinear optical devices. These devices are useful for efficient three-wave mixing of several different processes, and therefore offer greater flexibility with respect to the more common periodic nonlinear photonic crystals. We demonstrate applications for polarization switching as well as multi-wavelength and multi-directional frequency doubling. The generalized dual grid method is proven to be efficient for designing photonic quasicrystals for one-dimensional collinear devices as well as elaborate two-dimensional multi-directional devices. The cut and project method is physically realized by sending finite-width optical beams at an irrational angle through a periodic two-dimensional nonlinear photonic crystal. This enables two simultaneous collinear optical processes that can be varied by changing the angle of the beams.