Abstract
We investigate the absorption property of a single layer of
periodically rippled graphene adhering to dielectric substrate. By varying the
geometric parameters of the ripple and chemical potential of graphene, the
absorption can remarkably exceed that of planar graphene and reaches over 50%.
It is found that the absorption peak undergoes a redshift as the ripple height
increases. The variation of the incident angle will basically not influence
the absorption wavelength but may yield additional absorption peaks due to
higher order oscillation. The study reveals the optical response of graphene
in the intrinsically nonplanar profile and will benefit to the design of
graphene-based absorbers and photodetectors.
© 2016 IEEE
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