Optical storage based on coupling of one-way edge modes and cavity modes

We design a new kind of optical storage composed of a ring resonator that is based on both the one-way property of the edge modes of magneto-optical photonic crystals and the coupling effect of cavities. The ring resonator can be served as an optical storage through a close field circulation. Through another edge waveguide and coupling cavity, the electromagnetic signals can be either written into the storage or be taken out from it.