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Surface plasmon wave application in microwave modulator induced by switchable metamaterial
Author(s) -
Zhang Wenjuan,
Sun Liguo,
Lin Fujiang,
Zhu Guiqiang,
Lu Diqun
Publication year - 2016
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29549
Subject(s) - metamaterial , microwave , surface plasmon polariton , materials science , diode , pin diode , optoelectronics , surface plasmon , surface wave , optics , planar , plasmon , signal (programming language) , physics , engineering , telecommunications , computer science , computer graphics (images) , programming language
Corrugated metal surface with underlayer metal ground can propagate surface waves when the operation frequency is below the asymptotic limit–the surface plasma frequency. Tunability of the spoof surface plasmon polariton (SSPP) wave is realized by placing metamaterial underneath the SSPP strip. We design and experimentally demonstrate a modulator based on the planar surface plasmon waveguide and switchable metamaterial, where PIN diodes are implemented to tune the metamaterial. With the diodes working in on/off states, the proposed modulator can be, respectively, viewed as a signal‐stop/signal‐pass circuit at the operation frequency. The experimental results validated this method. It is observed that the proposed modulator would operate from 2.51 to 2.57 GHz with 12 dB on‐off isolation. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:261–263, 2016