Tunable beam steering enabled by graphene metamaterials
Fecha
2016Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Impacto
|
10.1364/OE.24.008848
Resumen
We demonstrate tunable mid-infrared (MIR) beam steering devices based on multilayer graphene-dielectric metamaterials. The effective refractive index of such metamaterials can be manipulated by changing the chemical potential of each graphene layer. This can arbitrarily tailor the spatial distribution of the phase of the transmitted beam, providing mechanisms for active beam steering. Three diffe ...
[++]
We demonstrate tunable mid-infrared (MIR) beam steering devices based on multilayer graphene-dielectric metamaterials. The effective refractive index of such metamaterials can be manipulated by changing the chemical potential of each graphene layer. This can arbitrarily tailor the spatial distribution of the phase of the transmitted beam, providing mechanisms for active beam steering. Three different beam steerer (BS) designs are discussed: a graded-index (GRIN) graphene-based metamaterial block, an array of metallic waveguides filled with graphene-dielectric metamaterial and an array of planar waveguides created in a graphene-dielectric metamaterial block with a specific spatial profile of graphene sheets doping. The performances of the BSs are numerically analyzed, showing the tunability of the proposed designs for a wide range of output angles (up to approximately 70°). The proposed graphene-based tunable beam steering can be used in tunable transmitter/receiver modules for infrared imaging and sensing. [--]
Materias
Metamaterials,
Graphene,
Beam steering
Editor
Optical Society of America
Publicado en
Optics Express, Vol. 24, Issue 8, pp. 8848-8861 (2016)
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Versión del editor
Entidades Financiadoras
This work was supported in part by the Spanish Government under Contract TEC2014-
51902-C2-2-R and the Government of the Russian Federation [Grant No. 074-U01]. B. O. is
sponsored by the Spanish Ministerio de Economía y Competitividad under grant FPI BES-
2012-054909. M.B. is sponsored by the Spanish Government via RYC-2011-08221. I.K. is
sponsored by the Russian Foundation for Basic Research under grant No. 14-07-31272.