Enhanced absorption in a graphene embedded 1D guided-mode-resonance structure without back-reflector and interferometrically written gratings
| Autor: | Jian Yi Pae, Vadakke Matham Murukeshan, Pankaj K. Sahoo |
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| Přispěvatelé: | School of Mechanical and Aerospace Engineering, Center for Optical and Laser Engineering, Singapore Centre for 3D Printing |
| Rok vydání: | 2019 |
| Předmět: |
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 |
| Zdroj: | Optics letters. 44(15) |
| ISSN: | 1539-4794 |
| Popis: | 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 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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