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Broadband Terahertz Plasmonic Response of Touching InSb Disks
Author(s) -
Hanham S. M.,
FernándezDomínguez A. I.,
Teng J. H.,
Ang S. S.,
Lim K. P.,
Yoon S. F.,
Ngo C. Y.,
Klein N.,
Pendry J. B.,
Maier S. A.
Publication year - 2012
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201202003
Subject(s) - terahertz radiation , materials science , plasmon , broadband , optoelectronics , terahertz metamaterials , optics , far infrared laser , physics , laser
The plasmonic behavior of dimers of touching semiconductor disks is studied experimentally in the difficult‐to‐realize regime where the disks are only marginally overlapping. Previous theoretical studies have shown that this geometry exhibits a highly efficient broadband response that may be very promising for light harvesting and sensing applications. By taking advantage of the plasmonic character of InSb in the terahertz regime, we experimentally confirm this broadband response and describe the associated strong field enhancement and sub‐micrometer field confinement between the disks.