Funneling Light Through a Subwavelength Aperture Using Epsilon Near Zero Materials
ORAL
Abstract
We show enhanced light funneling through subwavelength features at optical frequencies using an Epsilon-Near-Zero (ENZ) metamaterial layer. Our metamaterial consists of highly doped InAsSb, grown by Molecular Beam Epitaxy on a semi-insulating GaAs substrate. The bulk optical properties of the material are characterized as well as transmission through a subwavelength slit filled with the ENZ material. For TM polarizations (electric field perpendicular to the slit), there is a peak in the transmission spectra at the ENZ frequency. As expected, this enhancement is not seen for TE polarizations or in samples without the ENZ epilayer. The experimental results are supported by numerical simulations of the structure.
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