Journal
OPTICS LETTERS
Volume 36, Issue 17, Pages 3476-3478Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.36.003476
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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. (C) 2011 Optical Society of America
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