Reflection and transmission of obliquely incident graphene plasmons by discontinuities in surface conductivity: observation of the Brewster-like effect
| Autor: | Behzad Rejaei, Amin Khavasi, Saeed Farajollahi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
business.industry Graphene Surface plasmon Physics::Optics Charge density 02 engineering and technology 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Surface conductivity 020210 optoelectronics & photonics Optics Angle of incidence (optics) law Physics::Atomic and Molecular Clusters 0202 electrical engineering electronic engineering information engineering Reflection (physics) Reflection coefficient 0210 nano-technology business Plasmon |
| Zdroj: | Journal of Optics. 18:075005 |
| ISSN: | 2040-8986 2040-8978 |
| DOI: | 10.1088/2040-8978/18/7/075005 |
| Popis: | Scattering of graphene surface plasmons that are obliquely incident on a line discontinuity in graphene surface conductivity is investigated. The analysis is based on a solution of the quasi-static integral equation for surface charge density. It is shown that the reflection coefficient of the graphene plasmons reaches a minimum at a specific angle of incidence that depends on the ratio of conductivities of the two regions surrounding the discontinuity. This effect, which is similar to the well-known Brewster effect, is pronounced for abrupt discontinuities, but becomes weaker as the width of the transition region increases. The results obtained can be used for the design and analysis of devices based on graphene layers with non-uniform conductivity patterns. As an example, an approximate method is presented for obtaining the dispersion relation of waveguide modes in a graphene ribbon. |
| Databáze: | OpenAIRE |
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