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Small-Angle Ultra-Narrowband Tunable Mid-Infrared Absorber Composing from Graphene and Dielectric Metamaterials
- Source :
- Coatings, Volume 11, Issue 7, Coatings, Vol 11, Iss 825, p 825 (2021)
- Publication Year :
- 2021
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2021.
-
Abstract
- We report a small-angle ultra-narrowband mid-infrared tunable absorber that uses graphene and dielectric metamaterials. The absorption bandwidth of the absorber at the graphene Fermi level of 0.2 eV is 0.055 nm, and the absorption peaks can be tuned from 5.14803 to 5.1411 μm by changing the graphene Fermi level. Furthermore, the resonance absorption only occurs in the angle range of several degrees. The simulation field distributions show the magnetic resonance and Fabry–Pérot resonance at the resonance absorption peak. The one-dimensional photonic crystals (1DPCs) in this absorber act as a Bragg mirror to efficiently reflect the incidence light. The simulation results also show that the bandwidth can be further narrowed by increasing the resonance cavity length. As a tunable mid-infrared thermal source, this absorber can possess both high temporal coherence and near-collimated angle characteristics, thus providing it with potential applications.
- Subjects :
- Materials science
Physics::Optics
02 engineering and technology
Dielectric
mid-infrared absorber
01 natural sciences
law.invention
010309 optics
symbols.namesake
law
0103 physical sciences
Materials Chemistry
near-collimation
Absorption (electromagnetic radiation)
Photonic crystal
business.industry
Graphene
Fermi level
graphene
Metamaterial
Resonance
Surfaces and Interfaces
021001 nanoscience & nanotechnology
Distributed Bragg reflector
Engineering (General). Civil engineering (General)
Surfaces, Coatings and Films
symbols
Optoelectronics
TA1-2040
0210 nano-technology
business
absorption
Subjects
Details
- Language :
- English
- ISSN :
- 20796412
- Database :
- OpenAIRE
- Journal :
- Coatings
- Accession number :
- edsair.doi.dedup.....6f7f1f3e039f6fd7827bc9a63474b050
- Full Text :
- https://doi.org/10.3390/coatings11070825