Slow light devices based on cross and triangular graphene metamaterial structures

CN224536200UActive Publication Date: 2026-07-21HUBEI ENG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HUBEI ENG UNIV
Filing Date
2025-09-19
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing slow-light devices have low refractive index, narrow bandwidth, and large size, which is not conducive to the large-scale integration and application of optical devices.

Method used

Design a slow-light device based on cross-shaped and triangular graphene metamaterial structures. Utilize the SPPs and PIT effects generated by graphene to achieve three-channel slow light. Employ a combination structure of silicon substrate, cross-shaped graphene, and right-angled triangular graphene to produce a slow-light effect with a large group refractive index and wide bandwidth.

Benefits of technology

An ultra-compact slow-light device at the micrometer scale has been achieved, with a maximum group refractive index of 1150.11. Three significant PIT effect transmission windows are generated in the transmission spectrum, and the spectral bandwidth reaches 1.16 THz. This solves the problems of large size and narrow bandwidth of traditional slow-light devices and is easy to integrate.

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Abstract

The utility model relates to a kind of slow light devices based on cross and triangular graphene metamaterial structure, including silicon substrate and be located on the upper surface of silicon substrate cross cruciform graphene, first right triangle graphene, second right triangle graphene, third right triangle graphene, fourth right triangle graphene;Cross cruciform graphene is composed of horizontal graphene and vertical graphene by being mutually perpendicular;Cross cruciform graphene is set at the center of silicon substrate;First right triangle graphene, second right triangle graphene, third right triangle graphene, fourth right triangle graphene are respectively symmetrically set in the left front, right front, right rear and left rear of cross cruciform graphene.The utility model utilizes the SPPs generated by graphene has strong local light field enhancement characteristics, and the steep dispersion characteristics of PIT effect has, realizes a kind of micron order super-compact and large group refractive index graphene metamaterial structure slow light device.
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