Unusual percolation threshold of electromagnetic waves in double-zero medium embedded with random inclusions

被引：39

作者：

Luo, Jie ^{[1
]}

Hang, Zhi Hong ^{[1
]}

Chan, C. T. ^{[2
]}

Lai, Yun ^{[1
]}

机构：

[1] Soochow Univ, Coll Phys Optoelect & Energy, Suzhou 215006, Peoples R China

[2] Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China

来源：

LASER & PHOTONICS REVIEWS | 2015年 / 9卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Electromagnetic percolation; metamaterials; double-zero media; random media; PHOTONIC CRYSTALS; METAMATERIAL; INDEX; CONDUCTIVITY; REALIZATION; SCATTERING; PHYSICS;

D O I：

10.1002/lpor.201500083

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

By investigating the transmission of electromagnetic waves through random media composed of a random cluster of inclusions embedded in a "double-zero" medium with simultaneously near-zero permittivity and permeability, a percolation behavior of photons squeezing through the gaps between random inclusions with unity transmittance is observed. Interestingly, such a percolation exhibits a threshold induced by the long-range connectivity of the "nonconducting" component in the transverse direction instead of the "conducting" component in the propagation direction, which is distinctly different from those in normal percolations. This unusual phenomenon, obtained by full wave simulations, is explained analytically through the introduction of a geometric concept hereby denoted as "free surfaces". This work reveals a unique type of percolation threshold for electromagnetic waves with potential applications in energy harvesting, sensors and switches.

引用

页码：523 / 529

页数：7

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