Ultra-broad and sharp-transition bandpass terahertz filters by hybridizing multiple resonances mode in monolithic metamaterials

被引：48

作者：

Yeh, Ting-Tso ^{[1
]}

Genovesi, Simone ^{[2
,3
]}

Monorchio, Agostino ^{[2
]}

Prati, Enrico ^{[3
]}

Costa, Filippo ^{[2
]}

Huang, Tsung-Yu ^{[1
]}

Yen, Ta-Jen ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu, Taiwan

[2] Univ Pisa, Dipartimento Ingn Informaz, I-56122 Pisa, Italy

[3] CNR, Lab MDM, Ist Microelettron & Microsistemi, I-20041 Agrate Brianza, MI, Italy

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 07期

关键词：

EXPLOSIVES; 2ND-ORDER; DESIGN;

D O I：

10.1364/OE.20.007580

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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. (C)2012 Optical Society of America

引用

页码：7580 / 7589

页数：10

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