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. 2020 Mar 24;13(6):1470.
doi: 10.3390/ma13061470.

Extending Absorption Edge Through the Hybrid Resonator-Based Absorber With Wideband and Near-Perfect Absorption in Visible Region

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Free PMC article

Extending Absorption Edge Through the Hybrid Resonator-Based Absorber With Wideband and Near-Perfect Absorption in Visible Region

Yen-Chuan Lai et al. Materials (Basel). .
Free PMC article

Abstract

Metamaterial absorber with the unexpected capability for harvesting electromagnetic energy has been regarded as a potential route for various applications, including chemical/biological sensing, cloaking and photovoltaic applications. In this study, we presented the simple absorber design made with Al/SiO2/Al sandwich structures through the involvement of hybrid dual-resonators that could allow the wideband light absorption covered from 450 nm to 600 nm with average absorptivity above 95%. Examinations of excited electric field, magnetic field and total magnitude of electric field in three-dimensional space at resonances were performed to clarify the origin of resonant behaviors. In addition, an equivalent inductance-capacitance circuit model was proposed that could qualitatively explore the geometry-dependent absorption characteristics by modulating the constitutive parameters of hybrid resonators. As a result, the designed light absorber might enable to be practically applied for various optical-management and photovoltaic applications, and even offered the tunability for other desired frequency regions.

Keywords: broadband absorption; light absorber; optical metamaterials; resonances.

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
(a) Schematic illustration of the proposed dual-resonator based light absorber with defined structural parameters. (b) The calculated reflectance and absorbance spectra of the designed light absorber.
Figure 2
Figure 2
The calculated reflectance and absorbance spectra of (a) sole sandwich strip-like resonators and (b) sole sandwich square-like resonators. The corresponding evaluated magnetic field along the y-axis (c) at 520 nm from sandwich strip-like resonators and (d) at 460 nm and 570 nm from sandwich square-like resonators.
Figure 3
Figure 3
Examinations of (a) electric field in the x-axis, (b) magnetic field in the y-axis and (c) the total magnitude of electric field at resonances.
Figure 4
Figure 4
Contributions of varying the (a) strip lengths and (b) strip widths to the absorptance spectra.
Figure 5
Figure 5
Contributions of varying the (a) square widths and (b) thickness of the dielectric layer to the absorptance spectra.

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References

    1. Smith D.R., Padilla W.J., Vier D.C., Nemat-Nasser S.C., Schultz S. Composite medium with simultaneously negative permeability and permittivity. Phys. Rev. Lett. 2000;84:4184. doi: 10.1103/PhysRevLett.84.4184. - DOI - PubMed
    1. Engheta N., Ziolkowski R.W. A positive future for double-negative metamaterials. IEEE Trans. Microw. Theory Tech. 2005;53:1535–1556. doi: 10.1109/TMTT.2005.845188. - DOI
    1. Engheta N. An idea for thin subwavelength cavity resonators using metamaterials with negative permittivity and permeability. IEEE Antennas Wirel. Propag. Lett. 2002;1:10–13. doi: 10.1109/LAWP.2002.802576. - DOI
    1. Smith D.R., Schultz S., Markoš P., Soukoulis C.M. Determination of effective permittivity and permeability of metamaterials from reflection and transmission coefficients. Phys. Rev. B. 2002;65:195104. doi: 10.1103/PhysRevB.65.195104. - DOI
    1. Shelby R.A., Smith D.R., Schultz S. Experimental verification of a negative index of refraction. Science. 2001;292:77–79. doi: 10.1126/science.1058847. - DOI - PubMed
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