Surface Josephson Plasma Waves in Layered Superconductors above the Plasma Frequency: Evidence for a Negative Index of Refraction

被引：35

作者：

Golick, V. A. ^{[1
]}

Kadygrob, D. V. ^{[2
]}

Yampol'skii, V. A. ^{[1
,2
,3
]}

Rakhmanov, A. L. ^{[3
,4
]}

Ivanov, B. A. ^{[3
,5
,6
]}

Nori, Franco ^{[3
,7
]}

机构：

[1] Kharkov Natl Univ, UA-61077 Kharkov, Ukraine

[2] NASU, A Ya Usikov Inst Radiophys & Elect, UA-61085 Kharkov, Ukraine

[3] RIKEN, Adv Sci Inst, Wako, Saitama 3510198, Japan

[4] RAS, Inst Theoret & Appl Electrodynam, Moscow 125412, Russia

[5] NASU, Inst Magnetism, UA-03142 Kiev, Ukraine

[6] Natl T Shevchenko Univ Kiev, UA-03127 Kiev, Ukraine

[7] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 18期

关键词：

METAMATERIALS; CRYSTALS; MEDIA;

D O I：

10.1103/PhysRevLett.104.187003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We predict a new branch of surface Josephson plasma waves (SJPWs) in layered superconductors for frequencies higher than the Josephson plasma frequency. In this frequency range, the permittivity tensor components along and transverse to the layers have different signs, which is usually associated with negative refraction. However, for these frequencies, the bulk Josephson plasma waves cannot be matched with the incident and reflected waves in the vacuum, and, instead of the negative-refractive properties, abnormal surface modes appear within the frequency band expected for bulk modes. We also discuss the excitation of high-frequency SJPWs by means of the attenuated-total-reflection method.

引用

页数：4

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