AI Article Synopsis
- The study discusses how radially polarized THz radiation can pass through a specially designed dual circular metallic grating with tiny slits, showcasing unidirectional and asymmetric transmission effects.
- Theoretically, unidirectional transmission is demonstrated when a super-Gaussian beam is used, while experiments confirm the asymmetric transmission of a radially polarized beam at 0.1 THz.
- The system operates without nonlinear materials, indicating that its behavior is reciprocal and similar to certain planar metallic gratings.
Article Abstract
We report on unidirectional and asymmetric transmission of radially polarized THz radiation through a dual circular metallic grating with sub-wavelength slits. Unidirectional transmission is shown theoretically for a super-Gaussian incident beam, and an asymmetric transmission is demonstrated experimentally, when the radially polarized beam of 0.1 THz is obtained by converting a linearly polarized beam with a discontinuous phase retarder and a tapered waveguide. The dual grating does not include nonlinear materials, its operation is reciprocal, and analogous to that of some planar metallic gratings.
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| http://dx.doi.org/10.1364/OE.22.030547 | DOI Listing |
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