Subwavelength wire array metamaterial microwave cavities

Alchalaby, Ahmed; Al‐Janabi, Abdulhadi; Al-Rubaiee, Mohanad

doi:10.1117/12.2282808

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2021

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“…Subwavelength cavities using metal wire array metamaterials were prepared and characterized as follows. Subwavelength resonators and waveguides, operating in the microwave region, made of an array of copper wires of relatively large dimensions have been demonstrated in our previous work [19]. In the current work and in order to move to frequencies higher than microwave (i.e.…”

Section: Methodsmentioning

confidence: 75%

Metamaterials subwavelength terahertz resonant cavities

Al-Rubaiee

Al‐Janabi

Fleming

et al. 2021

J. Eur. Opt. Soc.-Rapid Publ.

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One of the unique properties of metamaterials is the ability to manipulate electromagnetic waves at subwavelength scales, made possible by their structure on these scales. Here, rather than consider effective bulk properties, we consider the properties of microscopic features based on considering resonant unit cells. We used wire array metamaterials to form localized resonant cavities by changing the resonance frequency of one or more unit cells, surrounded by unchanged unit cells that do not support resonance for the propagating mode (i.e. forming a band gap). We validate our approach experimentally with electromagnetic waves in the terahertz range, demonstrating and characterizing subwavelength resonant cavities in this range. These resonant cavities can pave the way for ultra-compact subwavelength waveguides and other optical components.

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Section: Methodsmentioning

confidence: 75%