“…1 On the other hand, in slow-light regime where light moves slower through the material, nonlinear effects will be intensified because light-matter interaction time is increased. Reducing pump power and having smaller dimensions are achieved by using ring waveguides, 14 coupled resonator optical waveguide structures, 15 cascaded microring resonator structures, 15,16 side coupled integrated spaced sequence of microrings, 17 and one channel coupled microrings. For this reason, to reduce the size and increase the intensity of nonlinear effects, slow light is employed.…”