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Multiple-band enhanced light absorption of monolayer graphene with critical coupling to guided mode resonance
- Source :
- AIP Advances, Vol 8, Iss 12, Pp 125102-125102-7 (2018)
- Publication Year :
- 2018
- Publisher :
- AIP Publishing, 2018.
-
Abstract
- We investigate subwavelength grating-coupled distributed Bragg reflector (DBR) in order to achieve total absorption at preselected wavelengths in a graphene monolayer. Multispectral and near-unity absorption (approximately 99.44% of the incident light at normal incidence) can be achieved in the proposed photonic structure at near-infrared (NIR) regimes. When the system meets the condition of critical coupling, the excited guided mode resonance (GMR) occurs at the resonance wavelength, and the corresponding electric field intensity around the graphene sheet can be greatly enhanced due to the reinforced light-graphene interaction. Multiple absorption peaks can be tuned within the wavelength region of 1.3 μm to 1.6 μm by varying the structural parameters. Our findings also indicate that the near-total-absorption peaks are highly dependent on the number and thickness of unit cells in DBR. These features make the proposed structure have great potential in applications of scalable perfect absorbers (PAs).
- Subjects :
- Materials science
business.industry
Graphene
Guided-mode resonance
General Physics and Astronomy
02 engineering and technology
021001 nanoscience & nanotechnology
Distributed Bragg reflector
01 natural sciences
Ray
lcsh:QC1-999
law.invention
Wavelength
law
Electric field
0103 physical sciences
Optoelectronics
Photonics
010306 general physics
0210 nano-technology
business
Absorption (electromagnetic radiation)
lcsh:Physics
Subjects
Details
- ISSN :
- 21583226
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- AIP Advances
- Accession number :
- edsair.doi.dedup.....e5f79814fc60ca01ca9413de67da1206
- Full Text :
- https://doi.org/10.1063/1.5048973