Achieving the polarization-manipulated multispectral perfect absorption and sensitive sensing via a metal/insulator/metal elliptical nanocavity array
| Autor: | Haimei Luo, Wen Yuan, Cheng Yin, Wenjuan Cai, Xingjiao Zhang, Ming-huang Sang, Qingqiang Kuang, Xianping Wang, Yingcong Zhang, Jian Wu, Shihua Cai |
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| Rok vydání: | 2020 |
| Předmět: |
Quantum optics
Materials science business.industry Physics::Optics Insulator (electricity) 02 engineering and technology Polarization (waves) 01 natural sciences Ray Atomic and Molecular Physics and Optics 010309 optics Wavelength 020210 optoelectronics & photonics 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Optoelectronics Surface plasmon resonance business Refractive index Plasmon |
| Zdroj: | Optical Review. 27:346-351 |
| ISSN: | 1349-9432 1340-6000 |
| Popis: | We present a polarization-manipulated multispectral perfect absorber based on a 2D metal/insulator/metal nanocavity array, in which a periodic structure of stacked Au–Al2O3 elliptical nanodisk is deposited on a bulk flat Au substrate. Theoretical analysis of the electromagnetic property showed that both the dipolar plasmon resonance and the plasmon cavity mode are the physical origins of the near-perfect absorption. Owing to the azimuthally symmetry breaking, the reflectivity difference can reach up to 90% through an orthogonal rotation of the incident light polarization. In addition, the central wavelength of these absorption bands is highly sensitive to variation of the surrounding liquid sample’s refractive index. This proposed sub-wavelength plasmonic platform with both features of the polarized manipulation and the sensitive sensing may provide promising applications in multi-wavelength filtering and bio-sensing. |
| Databáze: | OpenAIRE |
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