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Broadband Epsilon-Near-Zero Metamaterials with Step-like Metal-Dielectric Multilayer Structures with Gain Media

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Abstract

The broadband epsilon-near-zero metamaterials consisting of step-like metal-dielectric multilayer structures with gain media is proposed. Low-loss functional optical devices including prisms for broadband directional emission and S-shaped lenses for phase front shaping are demonstrated.

© 2014 Optical Society of America

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