Visible light full-waveband absorber based on graphene and one-dimensional photonic crystal composite structure

• Main Authors: FANG YUNTUAN, ZHU YUGUANG
• Format: Patent
• Language: Chinese; English
• Published: 11.02.2020
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention discloses a visible light full-waveband absorber based on a graphene and one-dimensional photonic crystal composite structure. The visible light full-waveband absorber has a periodic structure, the structure of one period is formed by alternately distributing a graphene layer G and two dielectric layers A and B along the z axis and is expressed as (GAB) N, wherein N is the number ofperiods, and the graphene is arranged on an interface of A and B. Specifically, in the structure of one period, the material layers sequentially comprise the graphene layer G, the dielectric layer A,the graphene layer G and the dielectric layer B. According to the designed composite structure, the specific transmission property of one-dimensional photonic crystals is utilized, the action frequency and time of electromagnetic waves and the graphene are greatly increased, the absorption rate is increased, and the absorption bandwidth is expanded. The absorption spectrum is adjusted to a visiblelight range by adjusting s