Nonlinear control of tunneling through an epsilon-near-zero channel

被引：70

作者：

Powell, David A. ^{[1
]}

Alu, Andrea ^{[2
,3
]}

Edwards, Brian ^{[2
]}

Vakil, Ashkan ^{[2
]}

Kivshar, Yuri S. ^{[1
]}

Engheta, Nader ^{[2
]}

机构：

[1] Australian Natl Univ, Nonlinear Phys Ctr, Res Sch Phys & Engn, Canberra, ACT 0200, Australia

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

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

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 24期

基金：

澳大利亚研究理事会;

关键词：

capacitance; dielectric waveguides; diodes; electromagnetic wave transmission; resonance; tunnelling; PERMITTIVITY;

D O I：

10.1103/PhysRevB.79.245135

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The epsilon-near-zero (ENZ) tunneling phenomenon allows full transmission of waves through a narrow channel even in the presence of a strong geometric mismatch. Here we experimentally demonstrate nonlinear control of the ENZ tunneling by an external field, as well as self-modulation of the transmission resonance due to the incident wave. Using a waveguide section near cut-off frequency as the ENZ system, we introduce a diode with tunable and nonlinear capacitance to demonstrate both these effects. Our results confirm earlier theoretical ideas on using an ENZ channel for dielectric sensing and their potential applications for tunable slow-light structures.

引用

页数：5

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