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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 Zhang
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.

History

Refereed

  • Yes

Volume

20

Issue number

23

Page range

25766-25773

Publication title

Optics Express

ISSN

1094-4087

Publisher

Optical Society of America

Language

  • other

Legacy posted date

2016-11-25

Legacy creation date

2016-11-18

Legacy Faculty/School/Department

ARCHIVED Faculty of Science & Technology (until September 2018)

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