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Enhanced absorption in a graphene embedded 1D guided-mode-resonance structure without back-reflector and interferometrically written gratings
Enhanced absorption in a graphene embedded 1D guided-mode-resonance structure without back-reflector and interferometrically written gratings
- Source :
- Optics letters. 44(15)
- Publication Year :
- 2019
-
Abstract
- A theoretical model based on the coupled mode theory is presented to calculate the absorption in a graphene embedded 1D guided-mode-resonance (GMR) structure that does not require a back reflector. The optimized graphene-GMR structure can absorb up to 70% of the incident light which far exceeds the already reported results without using any back-metal reflector or Bragg mirror. The theoretical analysis is valid for binary gratings and pyramidal gratings which are patterned using an interference lithography system. We experimentally validate our theoretical results and analyze the influence of the geometrical parameters to achieve critical coupling for the enhanced absorption. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) EDB (Economic Devt. Board, S’pore) Accepted version
- Subjects :
- Materials science
business.industry
Guided-mode resonance
Electrical and electronic engineering::Optics, optoelectronics, photonics [Engineering]
Physics::Optics
Reflector (antenna)
Absorption Spectroscopy
02 engineering and technology
021001 nanoscience & nanotechnology
Coupled mode theory
Distributed Bragg reflector
01 natural sciences
Ray
Atomic and Molecular Physics, and Optics
Interference lithography
010309 optics
Optics
Bragg Reflectors
0103 physical sciences
0210 nano-technology
Absorption (electromagnetic radiation)
business
Refractive index
Subjects
Details
- ISSN :
- 15394794
- Volume :
- 44
- Issue :
- 15
- Database :
- OpenAIRE
- Journal :
- Optics letters
- Accession number :
- edsair.doi.dedup.....bfa83087eddf57bf824ebf9e4f47e0fc