Beam-Scanning Planar Lens Based on MetalaDielectricaMetal Waveguide Arrays

Under specific illumination conditions, periodic arrays of metaladielectricametal (MDM) waveguides act as uniform optical phased-array antenna where the phase of the radiating optical wave can be controlled by modifying the refractive index distribution of the dielectric material. Based on this prop...

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Published inPlasmonics (Norwell, Mass.) Vol. 8; no. 2; pp. 481 - 486
Main Authors Zheng, Gaige, Xu, Linhua, Wu, Yigen, Su, Wei, Liu, Yuzhu
Format Journal Article
LanguageEnglish
Published 01.06.2013
Subjects
Arrays
Beams (radiation)
Focusing
Lenses
Mathematical models
Refractive index
Refractivity
Waveguides
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Summary:Under specific illumination conditions, periodic arrays of metaladielectricametal (MDM) waveguides act as uniform optical phased-array antenna where the phase of the radiating optical wave can be controlled by modifying the refractive index distribution of the dielectric material. Based on this property, we propose a planar gradient index MDM-based lens which can transform spherical waves of the transverse-magnetic surface plasmon polariton waves to plane waves with specific beam deflections by adjusting the refractive index configurations. Using numerical simulations based on two-dimensional finite-difference time-domain method, it is confirmed that beam focusing and splitting with multiple dflection angles can also be achieved.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:1557-1955
1557-1963
DOI:10.1007/s11468-012-9414-9