Multimode transmission in complementary plasmonic structures at terahertz frequencies

Zhongxiang Zhang; Kam Tai Chan; Yanxia Cui; Sailing He; Changlei Wang; Qirong Xing; Qingyue Wang
February 2010
Applied Physics Letters;2/15/2010, Vol. 96 Issue 7, p073506
Academic Journal
A three-dimensional subwavelength structure with periodic complementary metal patterns operating in the terahertz range has been proposed and fabricated. The device clearly exhibits three transmission modes under normal incidence, where experimental results obtained by terahertz time domain spectroscopy and simulated results agree very well with each other. The multimode transmission characteristics are found to arise from both localized coupling of fields between the interacting layers and propagating surface waves due to Bloch excitations on the surface of the periodic structure.


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