A parallel plate plasmonic waveguide is proposed in order to emulate the performance of apermittivity-near-zero metamaterial (ENZ) at optical wavelengths by working near the cut-off of the TE1mode. It is shown that the ENZ region can be tuned by simply modifying the electrical width of the dielectric spacerof the plasmonic waveguide. Also, a graded index (GRIN) epsilon-near-zero lens working at λ0=474.9 nm is designed by stacking 51 non-uniform plasmonic parallel plates, demonstrating numerically that this structure may be used to focus optical waves.
|Title of host publication||10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics – Metamaterials 2016|
|Publisher||Metamorphose VI AISBL|
|Number of pages||3|
|Publication status||Published - Sep 2016|