Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 45, Issue 50, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/45/50/505104
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Funding
- National Science Foundation of China [61201083, 61171024, 61171026, 60990320, 61161002, 60990324, 61071018]
- National High Tech (863) Projects [2011AA010202, 2012AA030702]
- 111 Project [111-2-05]
- Key National Science Foundation of China [61138001]
- China Postdoctoral Science Foundation [2012M511171]
- Natural Science Foundation of Guangxi [2011GXNSFB018064]
- Key Laboratory of Broadband Wireless Communication Foundation of Guangxi [11110]
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We propose a composite grating structure constructed by a double-periodic groove array with finite thickness, which supports two tightly bound spoof surface plasmon polaritons (SPPs) at two frequency bands. The two SPP waves correspond to the dominant modes of two single-periodic gratings with different groove depths, and the cutoff frequency of each mode is determined independently by the individual groove depth. We design and fabricate the dual-band SPP waveguide in the microwave frequency, and the measurement results show good performance of SPP propagations. The ability to guide two independent-band SPP waves could be important for developing novel surface wave devices.
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