Band-Gap Solitons in Nonlinear Photonic Crystal Waveguides and Their Application for Functional All-Optical Logic Gating

This review paper summarizes our previous findings regarding propagation characteristics of band-gap temporal solitons in photonic crystal waveguides with Kerr-type nonlinearity and a realization functional easily scalable all-optical NOT, AND NAND logic gates. The proposed structure consists planar air-hole type crystalline silicon as the nonlinear background material. A main advantage proposing gap-soliton signal carrier is that, by operating true time-domain, soliton maintains stable pulse envelope during each logical operation. Hence, multiple concatenated gates can be realized paving way to multiple-input ultrafast full-optical digital processing. In suggested setup, due features, there no need amplify output after operation which directly used new input for another efficiency well their scalability validated using original rigorous theoretical formalism confirmed full-wave computational electromagnetics.