6533b855fe1ef96bd12b1091

RESEARCH PRODUCT

Asymmetric transmission of transverse magnetic or radially polarized THZ waves through sub-wavelength gratings

Marcin StolarekCarlos J. Zapata-rodríguezTomasz SzoplikRafal KotynskiJ. LusakowskiD. Yavorskiy

subject

DiffractionPhysicsbusiness.industryTerahertz radiationPhysics::OpticsElectromagnetically induced gratingGratingPolarization (waves)Diffraction efficiencylaw.inventionUltrasonic gratingOpticslawBlazed gratingOptoelectronicsbusiness

description

We have developed a metallic double circular grating with sub-wavelength slits which blocks radially polarized light incident from one of its sides and acts as a focusing diffractive element in the other direction. The proposed grating has been optimized for the sub-THz frequency range. Unidirectional transmission through the grating has been demonstrated experimentally at 0.1 THz. We have also developed a planar metallic double grating with sub-wavelength slits which blocks light with a transverse magnetic polarization incident from one of the grating sides and transmits radiation incident from the opposite direction into the +1 and −1 diffraction orders. These gratings which could be used as unidirectional couplers consist of optically linear materials and their operation respects the Lorentz reciprocity theorem.

yearjournalcountryeditionlanguage
2015-07-012015 17th International Conference on Transparent Optical Networks (ICTON)
https://doi.org/10.1109/icton.2015.7193405