Polarization insensitive, broadband terahertz metamaterial absorber |
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Authors: | Grant James Ma Yong Saha Shimul Khalid Ata Cumming David R S |
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Institution: | School of Engineering, University of Glasgow, Glasgow, United Kingdom. |
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Abstract: | We present the simulation, implementation, and measurement of a polarization insensitive broadband resonant terahertz metamaterial absorber. By stacking metal-insulator layers with differing structural dimensions, three closely positioned resonant peaks are merged into one broadband absorption spectrum. Greater than 60% absorption is obtained across a frequency range of 1.86?THz where the central resonance frequency is 5?THz. The FWHM of the device is 48%, which is two and half times greater than the FWHM of a single layer structure. Such metamaterials are promising candidates as absorbing elements for bolometric terahertz imaging. |
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