Frequency mixing in nonlinear interaction of one-way edge-modes of topological photonic crystals

摘要

We investigate topological photonic crystals specially designed such that the frequencyband gaps appear around ω_0, 2ω_0, 3ω_0 and, more importantly, each band gap contains exactly oneunidirectional edge mode. These one-way edge modes are then utilized to implement keynonlinear frequency mixing processes, such as second- and third-harmonic generation.