Nonlinear Waveguides for Optical Logic and Computation

Abstract

Optical logic gates for OR-AND-NOT, NOR and exclusive-XNOR operations in waveguides consisting of nonlinear material are numerically investigated by means of FD-BPM (Finite Difference Beam Propagation Method). The proposed devices are designed utilizing the self-routing characteristics of nonlinear X-crossing and Y-branching structures when they are operated with one input beam or two. The numerical simulations show that the proposed structures can favorably be applied to optical data processing and computing as fundamental logic gates.

The logic of optics and the optics of logic

“…Recently, however, dissipative optical logic gates that are input/output speed limited have been made [4][5][6]. Being dissipative however, those gates require an energy penalty.…”

“…Most attempts at optical logic seem to have failed, but recently the field has been reborn with logic based on nonlinear optics that can operate at the Input/ Output (I/O) rate of the optical signal [4][5][6].…”

Fabrication of Straight Optical Waveguides Based on SnO₂ Nanomaterials

“…The development of telecommunications technology and optical data processing within ten years have been developed very rapidly [1]- [3]. The optical devices have many advantages when was compared either devices else based on the electrical or microwaves wave.…”

“…One of application of thin film waveguide is a power divider, and this device is a major component in the system of optical data processing and optical fiber communication systems. In the optical signal processing, the optical power divider which widely used is the Mach-Zehnder Interferometer [2]- [3], this Interferometer which required on optical power divider has good power balance factor.…”

All Optical Logic Gates Based on Two Dimensional Plasmonic Waveguides with Nanodisk Resonators

“…Some of these devices employ the effects of electro-optic or magneto-optic by applying respectively an electric or magnetic field, which has some disadvantages in switching time, loss and size [27,28].…”