Beam bending through compound structure with two subwavelength metallic slits in each period
To provide a more practical, easy-to-implement method to achieve directional modulation with a plasmonic lens, beam manipulation method via compound metallic gratings with two subwavelength slits filled with different dielectrics inside each period is proposed and numerically investigated by finite-...
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| Veröffentlicht in: | Optik (Stuttgart) 2014-02, Vol.125 (4), p.1529-1532 |
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| container_title | Optik (Stuttgart) |
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| creator | Zheng, Gaige Xu, Linhua Wu, Yigen Cao, Kun Chen, Yunyun Liu, Yuzhu |
| description | To provide a more practical, easy-to-implement method to achieve directional modulation with a plasmonic lens, beam manipulation method via compound metallic gratings with two subwavelength slits filled with different dielectrics inside each period is proposed and numerically investigated by finite-difference time-domain (FDTD) method. Compared with conventional metal-grating based structures, phase retardation is tuned by the Fabry-Pérot (FP) resonant condition and light bending is achieved by constructing a carefully designed, curved phase front for the plasmonic lenses. Our designs have advantages in ease of fabrication and capability to perform in the far field. With these advantages, the designs are expected to be valuable in applications such as plasmonic circuits and photonic communication. |
| doi_str_mv | 10.1016/j.ijleo.2013.08.041 |
| format | Article |
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| ispartof | Optik (Stuttgart), 2014-02, Vol.125 (4), p.1529-1532 |
| issn | 0030-4026 1618-1336 |
| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Beams (radiation) Bending Filled plastics Lenses Mathematical models Metallic gratings Modulation Plasmonics Slits Subwavelength structures Surface plasmon polaritons |
| title | Beam bending through compound structure with two subwavelength metallic slits in each period |
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