Photonic crystal all-optical exclusive-or logic gate structure based on interference principle

Abstract

The invention relates to a photonic crystal all-optical exclusive-or logic gate structure based on an interference principle. In the photonic crystal all-optical exclusive-or logic gate structure based on the interference principle, by designing a special structure of an interference arm, a phase difference is generated between in-phase lights of different port input devices; the length of the interference arm is calculated by using a coupling mode theory, so the phase difference of input lights which pass through the interference arm is even times of Pi; and by designing the structure of a wave combining area, interference lights are fully coupled, and the logic exclusive-or operation of an output waveguide is realized. The photonic crystal all-optical exclusive-or logic gate structure based on the interference principle is made of a two-dimensional air background medium column square crystal lattice material, wherein the medium column material is crystalline silicon, and an index of refraction is 3.48; and by designing the unique structures of the interference arm and the wave combining area, the broadband exclusive-or operation of a window of 1,550 nm can be realized, and a new method is provided for miniature photonic integration.

Description

technical field [0001] The invention relates to a photonic crystal all-optical XOR logic gate structure based on the principle of interference, and belongs to the technical field of optical logic gates. Background technique [0002] The 21st century is an information age with the network as the core. People's demand for information is increasing day by day, and they have higher requirements for the transmission rate and information processing rate of the network. As a network solution that realizes data transmission and processing only in the form of light (without photoelectric conversion), the all-optical network can provide high-speed, large-capacity transmission and processing capabilities, breaking through the bottleneck of optical / electrical conversion in existing networks, and All-optical logic gates are the core components to realize optical switching in all-optical networks and the key factors that determine network performance, so they have attracted more and more ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve some problems existing in current photonic crystal logic gates by designing novel logic gates: the first is that the performance of logic gates made by nonlinear effects such as the Cole effect is not stable enough due to the vibration of the pump light intensity; Logic gates made based on photonic crystal coupling cavity or self-collimation effect have high requirements for manufacturing precision or input light source, which will bring difficulties to the realization of logic gates

Images