An ultrabroad terahertz bandpass filter based on multiple-resonance excitation of a composite metamaterial

Yi Ju Chiang, Chan Shan Yang, Yu Hang Yang, Ci Ling Pan, Ta Jen Yen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)

Abstract

We experimentally present an ultrabroad terahertz (THz) bandpass filter based on a composite metamaterial (CMM) by exciting its multiple resonances. This metamaterial-based filter, consisting of a metal-dielectric-metal sandwiched structure, possesses a notable spectral-filtering capability with a 0.5-THz-broad bandwidth and excellent band-edge transitions of 140% THz and 182% THz in the THz-gap region. Furthermore, we manifest the mechanism for each of the resonances and the coupling within the composite metamaterial. This realization enables the capacity for engineering the electromagnetic properties to develop other complex optical functionalities. An example of a high-profile dualband THz bandpass filter is also proposed theoretically in this work.

Original languageEnglish
Article number191909
JournalApplied Physics Letters
Volume99
Issue number19
DOIs
Publication statusPublished - 2011 Nov 7
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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