Polarization beam splitter based on two-dimensional modified annular photonic crystals with square and triangular lattices
| Autor: | Taymaz Fathollahi-Khalkhali, Mohammad Reza Moghadam |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Plane wave expansion method General Engineering 02 engineering and technology Dielectric Polarization (waves) 01 natural sciences Atomic and Molecular Physics and Optics Rod law.invention 020210 optoelectronics & photonics Optics law Beam propagation method Lattice (order) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering 010306 general physics business Beam splitter Photonic crystal |
| Zdroj: | Optical Engineering. 57:1 |
| ISSN: | 0091-3286 |
| DOI: | 10.1117/1.oe.57.6.067101 |
| Popis: | We study a polarization beam splitting phenomenon in modified annular photonic crystals. The modified structures are composed of square and triangular lattices with circular and square air holes in a dielectric background in which a dielectric rod is added to each air hole. The inner dielectric rods are not located at the center of the holes and are oriented relative to the lattice axis. At first, isofrequency contours of the structures are numerically investigated for different sizes of air holes and rods, using the plane wave expansion method. The effects of additional rods are clearly demonstrated in terms of tilted contours, which is effective in the direction of flow of light for different polarizations. Finally, the finite-difference time-domain method is utilized to depict the different traveling path of two orthogonal transverse magnetic and electric polarizations. |
| Databáze: | OpenAIRE |
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