Experimental validation of strong directional selectivity in nonsymmetric metallic gratings with a subwavelength slit

Semih Cakmakyapan; Humeyra Caglayan; Andriy E. Serebryannikov; Ekmel Ozbay

doi:10.1063/1.3552675

Experimental validation of strong directional selectivity in nonsymmetric metallic gratings with a subwavelength slit

Semih Cakmakyapan^*
, Humeyra Caglayan
, Andriy E. Serebryannikov
, Ekmel Ozbay

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

70 Citations (Scopus)

Abstract

Strong directional selectivity is theoretically predicted and experimentally validated at the microwave frequencies in the beaming regime for a single subwavelength slit in nonsymmetric metallic gratings with double-side corrugations. The operation regime can be realized at a fixed angle of incidence when the surface-plasmon assisted transmission is significant within a narrow range of observation angles, if illuminating one of the grating interfaces, and tends to vanish for all observation angles, if illuminating the opposite interface. The studied effect is connected with asymmetry (nonreciprocity) in the beaming that occurs if the surface plasmon properties are substantially different for the two interfaces being well isolated from each other.

Original language	English
Article number	051103
Journal	Applied Physics Letters
Volume	98
Issue number	5
DOIs	https://doi.org/10.1063/1.3552675
Publication status	Published - 31 Jan 2011
Externally published	Yes
Publication type	A1 Journal article-refereed

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3552675

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abstract = "Strong directional selectivity is theoretically predicted and experimentally validated at the microwave frequencies in the beaming regime for a single subwavelength slit in nonsymmetric metallic gratings with double-side corrugations. The operation regime can be realized at a fixed angle of incidence when the surface-plasmon assisted transmission is significant within a narrow range of observation angles, if illuminating one of the grating interfaces, and tends to vanish for all observation angles, if illuminating the opposite interface. The studied effect is connected with asymmetry (nonreciprocity) in the beaming that occurs if the surface plasmon properties are substantially different for the two interfaces being well isolated from each other.",

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AU - Ozbay, Ekmel

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N2 - Strong directional selectivity is theoretically predicted and experimentally validated at the microwave frequencies in the beaming regime for a single subwavelength slit in nonsymmetric metallic gratings with double-side corrugations. The operation regime can be realized at a fixed angle of incidence when the surface-plasmon assisted transmission is significant within a narrow range of observation angles, if illuminating one of the grating interfaces, and tends to vanish for all observation angles, if illuminating the opposite interface. The studied effect is connected with asymmetry (nonreciprocity) in the beaming that occurs if the surface plasmon properties are substantially different for the two interfaces being well isolated from each other.

AB - Strong directional selectivity is theoretically predicted and experimentally validated at the microwave frequencies in the beaming regime for a single subwavelength slit in nonsymmetric metallic gratings with double-side corrugations. The operation regime can be realized at a fixed angle of incidence when the surface-plasmon assisted transmission is significant within a narrow range of observation angles, if illuminating one of the grating interfaces, and tends to vanish for all observation angles, if illuminating the opposite interface. The studied effect is connected with asymmetry (nonreciprocity) in the beaming that occurs if the surface plasmon properties are substantially different for the two interfaces being well isolated from each other.

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Experimental validation of strong directional selectivity in nonsymmetric metallic gratings with a subwavelength slit

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