2D asymmetric propagation based on CPA in helical photonic lattices

摘要

We propose a method for realizing two-dimensional (2D) non-reciprocal (one-way) transmission of discretized light based on the unidirectional coherent perfect absorption (CPA) in a helical optical waveguide array. By introducing a lossy element as a defect, the linear, purely passive optical lattice achieved the one-way propagation between the first and third waveguide layers.