Extending Absorption Edge through the Hybrid Resonator-Based Absorber with Wideband and Near-Perfect Absorption in Visible Region
Open Access
- 24 March 2020
- Vol. 13 (6), 1470
- https://doi.org/10.3390/ma13061470
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.Funding Information
- Ministry of Science and Technology, Taiwan (MOST 107-2221-E-006-013-MY3)
This publication has 31 references indexed in Scilit:
- Wide-angle infrared absorber based on a negative-index plasmonic metamaterialPhysical Review B, 2009
- Three-dimensional optical metamaterial with a negative refractive indexNature, 2008
- Perfect Metamaterial AbsorberPhysical Review Letters, 2008
- Demonstration of metal-dielectric negative-index metamaterials with improved performance at optical frequenciesJournal of the Optical Society of America B, 2006
- A positive future for double-negative metamaterialsIEEE Transactions on Microwave Theory and Techniques, 2005
- Metamaterials and Negative Refractive IndexScience, 2004
- Determination of effective permittivity and permeability of metamaterials from reflection and transmission coefficientsPhysical Review B, 2002
- An idea for thin subwavelength cavity resonators using metamaterials with negative permittivity and permeabilityIEEE Antennas and Wireless Propagation Letters, 2002
- Experimental Verification of a Negative Index of RefractionScience, 2001
- Composite Medium with Simultaneously Negative Permeability and PermittivityPhysical Review Letters, 2000