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Open AccessFeature PaperReview

Surface Lattice Resonances in THz Metamaterials

by 1,2,3, Eric Plum 3 and Ranjan Singh 1,2,*
1
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
2
Centre for Disruptive Photonic Technologies, The Photonics Institute, Nanyang Technological University, Singapore 637371, Singapore
3
Centre for Photonic Metamaterials & Optoelectronics Research Centre, Zepler Institute, University of Southampton, Southampton SO17 1BJ, UK
*
Author to whom correspondence should be addressed.
Photonics 2019, 6(3), 75; https://doi.org/10.3390/photonics6030075
Received: 28 May 2019 / Revised: 17 June 2019 / Accepted: 21 June 2019 / Published: 26 June 2019
(This article belongs to the Special Issue Terahertz Photonics)
Diffraction of light in periodic structures is observed in a variety of systems including atoms, solid state crystals, plasmonic structures, metamaterials, and photonic crystals. In metamaterials, lattice diffraction appears across microwave to optical frequencies due to collective Rayleigh scattering of periodically arranged structures. Light waves diffracted by these periodic structures can be trapped along the metamaterial surface resulting in the excitation of surface lattice resonances, which are mediated by the structural eigenmodes of the metamaterial cavity. This has brought about fascinating opportunities such as lattice-induced transparency, strong nearfield confinement, and resonant field enhancement and line-narrowing of metamaterial structural resonances through lowering of radiative losses. In this review, we describe the mechanisms and implications of metamaterial-engineered surface lattice resonances and lattice-enhanced field confinement in terahertz metamaterials. These universal properties of surface lattice resonances in metamaterials have significant implications for the design of resonant metamaterials, including ultrasensitive sensors, lasers, and slow-light devices across the electromagnetic spectrum. View Full-Text
Keywords: surface lattice resonances; metamaterials; terahertz; diffraction surface lattice resonances; metamaterials; terahertz; diffraction
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MDPI and ACS Style

Tan, T.C.; Plum, E.; Singh, R. Surface Lattice Resonances in THz Metamaterials. Photonics 2019, 6, 75.

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