In this paper a perfect THz absorber with nearly unity peak absorbance (>99%) and less than 1% full width at half maximum bandwidth based on an insulator-metal-insulator-metal structure composed of high reflective metallic films and silicon slabs are demonstrated. Thanks to the introduction of top silicon layer, the incident terahertz field can tunnel through the initially perfect reflective top gold film and be strongly absorbed at the Fabry-Pérot resonance supported by the bottom metal-insulator-metal substructure. Most surprisingly, the FP resonant absorption peak can be infinitely narrowed with no degradation to the peak absorbance. The perfect absorption (>99%) and ultranarrowband width make the terahertz absorber promising in terahertz plasmonic devices such as filter, narrowband THz emitter, etc.

© 2014 Optical Society of America

PDF Article
More Like This
Ultra-narrow-band multi-channel perfect absorber based on optical Tamm states in metal-dielectric-metal waveguid

Xiang Wu, Yunqing Lu, Jiong Xu, Ji Xu, and Jin Wang
Su2A.141 Asia Communications and Photonics Conference (ACPC) 2018

Thin Film Dual Band Metamaterial Absorber Based on Gold Triangular Patches

Peiqian Tong, Shou Zhang, Yanxia Cui, Yinyue Lin, Ting Ji, and Yuying Hao
AF2B.50 Asia Communications and Photonics Conference (ACPC) 2013

Broadband terahertz metamaterial absorber based on planar square-spiral antenna

Shigao Feng, Xiaoliang Sun, Dejia Meng, Honghao Yu, Ping Yu, and Changhong Chen
ATh3A.72 Asia Communications and Photonics Conference (ACPC) 2014


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription