Analytical study of subwavelength imaging by uniaxial epsilon-near-zero metamaterial slabs

被引：27

作者：

Castaldi, Giuseppe ^{[1
]}

Savoia, Silvio ^{[1
]}

Galdi, Vincenzo ^{[1
]}

Alu, Andrea ^{[2
]}

Engheta, Nader ^{[3
]}

机构：

[1] Univ Sannio, Waves Grp, Dept Engn, I-82100 Benevento, Italy

[2] Univ Texas Austin, Dept Elect & Comp Engn, Austin, TX 78712 USA

[3] Univ Penn, Dept Elect & Syst Engn, Philadelphia, PA 19104 USA

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 11期

关键词：

SILVER SUPERLENS; INTEGRALS; MEDIA; WAVE;

D O I：

10.1103/PhysRevB.86.115123

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We discuss the imaging properties of uniaxial epsilon-near-zero metamaterial slabs with possibly tilted optical axis, analyzing their subwavelength focusing properties as a function of the design parameters. We derive in closed analytical form the associated two-dimensional Green's function in terms of special cylindrical functions. For the near-field parameter ranges of interest, we are also able to derive a small-argument approximation in terms of simpler analytical functions. Our results, validated and calibrated against a full-wave reference solution, expand the analytical tools available for computationally efficient and physically incisive modeling and design of metamaterial-based subwavelength imaging systems.

引用

页数：10

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