Two-dimensional photonic crystal controllable ''AND/OR'' logic gate

Abstract

The invention relates to a two-dimensional photonic crystal controllable ''AND / OR'' logic gate which comprises four input waveguides and an output waveguide, wherein one input waveguide is used for inputting a control signal; one input waveguide is an idle waveguide; and the other two input waveguides are signal input waveguides. The logic gate is distributed in a mirror symmetry way with a network center axial line of a linear defect waveguide; the symmetrical center position of the intersection of every two input waveguides of the logic gate is provided with a nonlinear dielectric rods as a coupling modulating zone for modulating signal power leading to the next stage of output waveguide; and a nonlinear dielectric rod is arranged on the output waveguide of the logic gate away from the third dielectric rod of the coupling modulating zone. The controllable AND / OR logic gate can be used for logic control of an optical signal by using an all-optical signal, and has the characteristics of small volume, simple structure and high response speed. In addition, all-optical modules of different functions can be manufactured on the same chip so as to be suitable for large-scale optoelectronic integration.

Description

technical field [0001] The invention relates to the field of optoelectronic information technology, in particular to a two-dimensional photonic crystal controllable "and / OR" logic gate. Background technique [0002] All-optical logic devices are devices that directly use photons to realize logic functions such as "and", "or", and "not". An important device in all-optical communication. Most of the optical logic gate devices that have been proposed so far require electro-optic control, or have a single logic function, or use interferometers, such as Mach-Zehnder interferometer (patent No. 200620115693.X), Sagnac interferometer and other systems (patent No. 200810044878 .X) and so on, the structure is complex and bulky, which is not conducive to large-scale all-optical integration. Contents of the invention [0003] The purpose of the present invention is to address the above-mentioned deficiencies, to provide a two-dimensional photonic crystal controllable "and / or" logi...

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Problems solved by technology

[0003] The purpose of the present invention is to address the above-mentioned deficiencies, to provide a two-dimensional photonic crystal controllable "and / or" logic gate that can be logically controlled by all-optical signals. Due to the structure and process characteristics of the two-dimensional photonic crystal itself, it can The functional modules can be integrated on the same chip, which has the advantages of small size, simple structure, fast speed, and simple manufacturing process, and can be applied to large-scale all-optical integration to solve the complex structure and bulky size of current optical logic gate devices. , which is not conducive to large-scale all-optical integration and other issues

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