A new artificial material approach for flat THz frequency lenses

Savini, Giorgio and Ade, Peter A. R. and Zhang, Jin (2012) A new artificial material approach for flat THz frequency lenses. Optics Express, 20 (23). pp. 25766-25773. ISSN 1094-4087

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Official URL: https://doi.org/10.1364/OE.20.025766


Stacked layers of metal meshes embedded in a dielectric substrate are routinely used for providing spectral selection at THz frequencies. Recent work has shown that particular geometries allow the refractive index to be tuned to produce practical artificial materials. Here we show that by spatially grading in the plane of the mesh we can manufacture a Graded Index (GrIn) thin flat lens optimized for use at THz frequencies. Measurements on a prototype lens show we are able to obtain the parabolic profile of a Woods type lens which is dependent only on the mesh parameters. This technique could realize other exotic optical devices.

Item Type: Journal Article
Keywords: gradient index lenses, artificially engineered materials, lense
Faculty: ARCHIVED Faculty of Science & Technology (until September 2018)
Depositing User: Dr. JIN ZHANG
Date Deposited: 25 Nov 2016 15:06
Last Modified: 09 Sep 2021 16:16
URI: https://arro.anglia.ac.uk/id/eprint/701165

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