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Spoof Plasmon Surfaces: A Novel Platform for THz Sensing
Author(s) -
Ng Binghao,
Wu Jianfeng,
Hanham Stephen M.,
FernándezDomínguez Antonio I.,
Klein Norbert,
Liew Yun Fook,
Breese Mark B. H.,
Hong Minghui,
Maier Stefan A.
Publication year - 2013
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201300146
Subject(s) - terahertz radiation , plasmon , refractive index , materials science , prism , optics , figure of merit , surface plasmon , optoelectronics , metamaterial , dielectric , surface plasmon polariton , sensitivity (control systems) , surface plasmon resonance , physics , nanotechnology , nanoparticle , electronic engineering , engineering
Spoof plasmon surfaces consisting of linear arrays of subwavelength grooves are proposed as a novel platform for THz sensing. The tightly confined spoof plasmons, coupled via an Otto prism setup, are sensitive to the refractive index of the dielectric filling the grooves. Phase jumps at spoof plasmon resonances are used as a readout response for refractive index sensing. An overall sensitivity of 0.49 THz RIU −1 with figures‐of‐merit as high as 49 are achieved.