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A new artificial material approach for flat THz frequency lenses
journal contribution
posted on 2023-07-26, 13:59 authored by Giorgio Savini, Peter A. R. Ade, Jin ZhangStacked 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.
History
Refereed
- Yes
Volume
20Issue number
23Page range
25766-25773Publication title
Optics ExpressISSN
1094-4087External DOI
Publisher
Optical Society of AmericaLanguage
- other
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Legacy posted date
2016-11-25Legacy creation date
2016-11-18Legacy Faculty/School/Department
ARCHIVED Faculty of Science & Technology (until September 2018)Usage metrics
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