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Coupled-cavity-based Slow Light Metamaterials with Antireflection Structures
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- Authors
- Sun-Goo Lee, Seong-Han Kim, Soo-Yong Jung, Jongjin Lee, Jong-Moon Park, Chul-Sik Kee
- Issue Date
- 2016-11
- Citation
- Applied Physics Letters, v.109, no.22, pp.1-4
- ISSN
- 0003-6951
- Publisher
- American Institute of Physics (AIP)
- Language
- English
- Type
- Journal Article
- Abstract
- A slow light metamaterial based on a coupled Fabry-P챕rot cavity is proposed and numerically studied using finite-difference time-domain simulations. The coupled cavity-based slow light metamaterial is composed of a periodic array of partial mirrors with low transmittance, i.e., thin metal films perforated with a subwavelength hole array. The tight-binding model is employed to investigate the transmission properties of the coupled-cavity-based metamaterial. It is shown that the group velocities of the slowly propagating modes can be controlled by adjusting the radius of holes in the mirrors. We also show that undesirable reflections at the boundaries of the finite-size metamaterial can be minimized by introducing optimized antireflection structures.
- KSP Keywords
- Finite-difference Time-domain(FDTD), Hole array, Low transmittance, Periodic array, Thin metal films, Tight-binding(DFTB), Tight-binding model, Transmission properties, coupled-cavity, finite-difference time-domain simulations, slow light