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Angular-insensitive optical filtering based on meta-GMR
- Source :
- Optics express. 28(12)
- Publication Year :
- 2020
-
Abstract
- In this study, the optical properties of a meta-GMR consisting of a metasurface stacked on a planar dielectric slab waveguide were theoretically investigated. Two different metasurfaces, namely chiral split-ring resonator dimer arrays with/without a rod-shaped antenna, were investigated and compared. Conventional GMR filters utilize gratings to couple the free-space electromagnetic field to the waveguide. The highly dispersive nature of grating leads to low angular tolerance. Here, the grating is replaced by metasurfaces. The metasurface unit cell can be regarded as a polarizable dipole that couples the free-space electromagnetic field to the waveguide and decouples the waveguide mode to the radiation modes. Based on the localized nature of the resonant metasurfaces, the metasurface/GMR hybrid mode exhibits a superior angular tolerance as compared with a conventional GMR filter. This study can open a new avenue to tailor the optical properties of GMR-based devices.
- Subjects :
- Electromagnetic field
Waveguide (electromagnetism)
Materials science
business.industry
Guided-mode resonance
Physics::Optics
02 engineering and technology
Grating
021001 nanoscience & nanotechnology
Diffraction efficiency
01 natural sciences
Atomic and Molecular Physics, and Optics
010309 optics
Condensed Matter::Materials Science
Resonator
Dipole
Optics
0103 physical sciences
Antenna (radio)
0210 nano-technology
business
Subjects
Details
- ISSN :
- 10944087
- Volume :
- 28
- Issue :
- 12
- Database :
- OpenAIRE
- Journal :
- Optics express
- Accession number :
- edsair.doi.dedup.....5217a2eff144c46cac828f382f9c7830