title: All-optical switches, unidirectional flow, and logic gates with discrete solitons in waveguide arrays.
abstract: We propose a mechanism by which a number of useful all-optical operations, such as switches, diodes, and logic gates, can be performed with a single device. An effective potential well is obtained by modulating the coupling between the waveguides through their separations. Depending on the power of a control soliton injected through the potential well, an incoming soliton will either completely transmit or reflect forming a controllable switch. We show that two such switches can work as AND, OR, NAND, and NOR logic gates. Furthermore, the same device may also function as a perfect soliton diode with adjustable polarity. We discuss the feasibility of realising such devices with current experimental setups.
authors.forename: U
authors.initials: U
authors.lastname: Al Khawaja
authors.forename: S M
authors.initials: SM
authors.lastname: Al-Marzoug
authors.forename: H
authors.initials: H
authors.lastname: Bahlouli