| Autor: |
Daniel F. Sievenpiper, Dia'aaldin J. Bisharat, Sara M. Kandil |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Metamaterials, Metadevices, and Metasystems 2020. |
| DOI: |
10.1117/12.2568968 |
| Popis: |
Over the last decade, much research has been directed towards making conventional optical devices such as lenses and waveguides using flat surfaces. Using planar optics provides compact on-chip platforms that are easily integrated. In addition, it allows for new degrees of freedom for controlling the flow of light as well as avoids the accumulation of amplitude and phase changes that occur to the wave in conventional optical systems when propagating over distances from one component to the other. In this paper, we present a metasurface design made of c-shaped metallic elements that supports confined surface wave propagation. The c-shaped design provides high self-collimation which is advantageous for use in surface waveguiding. Another advantage of using the c-shaped design is that by carefully choosing its dimensions, one can engineer its equifrequency contour to split the linearly polarized wave into two circularly polarized waves of different helicities propagating with different k-vectors along the surface. This makes the c-shaped metasurface efficient for use as a polarization-based beam splitter. Additionally, we show that by slowly rotating the c-shaped cells and varying its size along the surface, we were able to steer the circularly polarized surface wave with only one helicity along a specified curved path while completely blocking the other helicity. This work highlights the high degree of freedom achieved from using homogenous metasurface designs for manipulating the spin-orbit interaction of electromagnetic waves and providing a great control on their polarization and propagation properties on the surface. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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