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Research on terahertz filter based on metal micro-structure

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Abstract

With the realization of terahertz wave generator and detector, electromagnetic terahertz frequency range (0.1-10THz) attracted significant attention and has been extensively investigated. Many potential applications of terahertz waves have been dramatically explored including medical diagnosis, security screening, military detection, radio astronomy, atmospheric studies, and communication. These interests have highlighted the need for numerous functional devices and components for controlling and manipulating terahertz waves, many of which are still lacking. For broadband terahertz systems, one such component is a terahertz wave filter. Spectral filtering is a key capability in many different optical systems, and will also be crucial in the implementation of future broadband terahertz communications systems. Terahertz wave filter, a metal micro-structure, has been characterized by the mode-matching theory. The peak of the transmittance of is about 99.99% from 0.835THz to 1.161THz and 3dB bandwidth of 326GHz.

© 2012 Optical Society of America

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