title: Planar broadband and high absorption metamaterial using single nested resonator at terahertz frequencies.
abstract: A planar broadband metamaterial absorber with high absorptivity working at terahertz frequencies was designed and fabricated in this work. Two nested back-to-back split-ring resonators (BSRRs) constitute a single resonator, which achieves three strong resonances, with two of them merged into a broadband peak. Cobalt silicide and parylene-C were innovatively applied as ground plane and dielectric spacer. The nested BSRR absorber experimentally realizes a bandwidth of 0.66 THz with the absorptivity above 0.8, and the highest absorptivity reaches 0.97. Taking the central frequency at 2.74 THz, the measured FWHM is 47% and the Q factor is 2.13.
authors.forename: Yongzheng
authors.initials: Y
authors.lastname: Wen
authors.forename: Wei
authors.initials: W
authors.lastname: Ma
authors.forename: Joe
authors.initials: J
authors.lastname: Bailey
authors.forename: Guy
authors.initials: G
authors.lastname: Matmon
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Yu
authors.forename: Gabriel
authors.initials: G
authors.lastname: Aeppli
mesh_terms: D065638:Absorption, Radiation; D003035:Cobalt / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D055096:Optical Devices; D020349:Surface Plasmon Resonance / Q000295:instrumentation* / Q000379:methods; D055053:Terahertz Radiation; D014159:Transducers
chemical_list: D003035:Cobalt