Slow light waveguide device of photonic crystal based on two-dimensional silicon

Abstract

The invention belongs to the technical field of the optics and relates to a slow light waveguide device of a photonic crystal based on two-dimensional silicon. The slow light waveguide device is characterized in that 6-10 rows of circular-segment scatterers with the center line of a two-dimensional silicon slice as the symmetrical axis are dug on the surface of the two-dimensional silicon slice in the direction of the long side of the two-dimensional silicon slice in sequential arrangement mode, and a row not dug with the circular-segment scatterers is reserved on the symmetrical axis of the two-dimensional silicon slice to form a line defect; 5-30 circular-segment scatterers are dug on each of the 6-10 rows at equal interval; each circular-segment scatterer is formed by two semi-circle segments, and hollowed through circular-segment scatterers sequentially arranged on the two-dimensional silicon slice are of symmetrical structures; the direction of the line defect is parallel to the long axis direction of the circular-segment scatterers; and the arrangement structure of the circular-segment scatterers is fixed. The slow light waveguide device does not need a complex and large system, has the advantages of being small in volume, low in cost, high in stability and efficiency, simple and practicable, is high in group refractivity, large in slow light bandwidth and good in signal fidelity and is a novel photonic crystal slow light structure.

Description

Technical field: [0001] The invention belongs to the field of optical technology, and relates to a two-dimensional silicon-based photonic crystal slow light waveguide device, in particular to a gradual line defect photonic crystal slow light waveguide structure, which is a two-dimensional terahertz frequency domain constructed by circular bow-shaped scattering elements. Silicon-based porous longitudinal gradient line defect photonic crystal slow light waveguide structure. Background technique: [0002] The slow light effect is that the group velocity of electromagnetic waves is much lower than the speed of light, so as to facilitate the buffering and processing of transmitted information, and can be widely used in fields such as optical delay lines and buffers. The photonic crystal slow light structure or device has incomparable advantages in the application of all-optical communication systems and all-optical information processing due to its small and compact structure, lo...

AI Technical Summary

Problems solved by technology

At present, there is no research on the application of two-dimensional gradient line defect waveguide structure to photonic crystal slow light; many researchers believe that the gradual change process destroys the symmetry of the structure, the slow light effect will be weakened, and even the slow light effect cannot be formed.

[0004] Existing technologies have proved that the slow light effect can be used in optical delay, all-optical buffering, optical storage, and light-material interaction. The photonic crystal structure has a small size and is easy to integrate. The slow light effect can be controlled by designing the structure. There are no special requirements for the working environment, and it can work at room temperature, which is convenient for coupling and matching with optical fiber systems. Moreover, the realization of photonic crystal slow-light structures will drive breakthroughs in all-optical buffering, all-optical information processing, and all-optical communication network applications. It will have a profound impact on the development of all-optical information; seek to design a two-dimensional silicon-based hole-shaped longitudinal gradient line-defect photonic crystal slow-light waveguide structure constructed by circular bow-shaped scattering elements, which can well achieve low dispersion and low group velocity Broadband slow light, widely used in the buffering and processing of all-optical information, has important practical application value

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