Ultra-broad and sharp-transition bandpass terahertz filters by hybridizing multiple resonances mode in monolithic metamaterials
Articolo
Data di Pubblicazione:
2012
Citazione:
Ultra-broad and sharp-transition bandpass terahertz filters by hybridizing multiple resonances mode in monolithic metamaterials / T. Yeh, S. Genovesi, A. Monorchio, E. Prati, F. Costa, T. Huang, T. Yen. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 20:7(2012), pp. 7580-7589. [10.1364/OE.20.007580]
Abstract:
We present three monolithic metamaterial-based THz bandpass filters, the skewed circular slot rings, meandered slots and Jerusalem cross slots, to fit in the THz gap. These THz bandpass filters are comprised of a metal-dielectric-metal (MDM) structure that supports multiple resonances of electric dipole, magnetic dipole, and standing-wave-like modes. By exciting and further hybridizing these individual resonance modes, we demonstrate excellent performance of broad bandwidth and sharp band-edge transition beyond conventional bandpass filters. By further employing our ad hoc Genetic Algorithm (GA) and Periodic Method of Moments (PMM) to optimize our designs, we achieve an ultra-broad 3dB fractional bandwidth and sharp band-edge transition up to 82.2% and 58.3 dB/octave, respectively, benefiting the practical applications such as material recognition in security systems, imaging, and absorbers.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
T. Yeh, S. Genovesi, A. Monorchio, E. Prati, F. Costa, T. Huang, T. Yen
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