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Dual-band plasmonic resonator based on Jerusalem cross-shaped nanoapertures
- Publication Year :
- 2015
-
Abstract
- In this paper, we both experimentally and numerically introduce a dual-resonant metamaterial based on subwavelength Jerusalem cross-shaped apertures. We numerically investigate the physical origin of the dual-resonant behavior, originating from the constituting aperture elements, through finite difference time domain calculations. Our numerical calculations show that at the dual-resonances, the aperture system supports large and easily accessible local electromagnetic fields. In order to experimentally realize the aperture system, we utilize a high-precision and lift-off free fabrication method based on electron-beam lithography. We also introduce a fine-tuning mechanism for controlling the dual-resonant spectral response through geometrical device parameters. Finally, we show the aperture system's highly advantageous far- and near-field characteristics through numerical calculations on refractive index sensitivity. The quantitative analyses on the availability of the local fields supported by the aperture system are employed to explain the grounds behind the sensitivity of each spectral feature within the dual-resonant behavior. Possessing dual-resonances with large and accessible electromagnetic fields, Jerusalem cross-shaped apertures can be highly advantageous for wide range of applications demanding multiple spectral features with strong nearfield characteristics. (C) 2015 Elsevier B.V. All rights reserved.
- Subjects :
- Electromagnetic field
Physics
business.industry
Aperture
Finite-difference time-domain method
Metamaterial
Condensed Matter Physics
Nanofabrication
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Resonator
Optics
Hardware and Architecture
Metamaterials
Subwavelength optics
Plasmonics
Multi-band device
Sensitivity (control systems)
Electrical and Electronic Engineering
business
Multi-band resonator
Plasmon
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....3a035ab4522b49bd739bbec003e3a53f