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Updated: Oct 1, 2025

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
Observation of a High-Energy Tamm Plasmon State in the Near-IR Region
Oleksandr Buchnev1,2, Alexandr Belosludtsev3, Vassili A Fedotov1,2
1Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, U.K.
Abstract:
We report on the experimental observation of a Tamm plasmon state in the near-IR region characterized by an anomalously high energy level located in the upper half of the photonic band gap. Such a "blue" Tamm plasmon was demonstrated at the interface between a conventional, completely periodic Bragg reflector and a nanostructured nonresonant thin gold grating. We study the effect of the grating period on the characteristics of the anomalous state and show that the anomaly results from a nontrivial topology of the nanograting's optical near field, which cannot be captured by the effective medium approach and transfer matrix method commonly employed in the analysis of Tamm plasmons.
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