Analytical method for the diffraction of an electromagnetic wave by subwavelength graphene ribbons

نویسندگان

چکیده

Theoretical study of arrays graphene ribbons is currently high interest due to its potential application in beam splitters, absorbers, and polarizers. In this paper, an analytical method presented for diffraction analysis ribbon arrays. Previous studies were carried out the regime where lateral separation between much smaller than wavelength incident wave. As such, they cannot be used calculate reflection coefficients higher diffracted orders. contrast, proposed here can predict electromagnetic response even when array constant larger wavelength. To reach our results, we first derive expression surface density electric current induced on by incident, transverse-magnetic, plane Next, closed-form expressions are obtained zeroth The results excellent agreement with those from full-wave simulations. facilitates design tunable gratings many applications terahertz optics.

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ژورنال

عنوان ژورنال: Journal of The Optical Society of America B-optical Physics

سال: 2021

ISSN: ['0740-3224', '1520-8540']

DOI: https://doi.org/10.1364/josab.413933