Nondiffracting Bessel plasmons

被引：22

作者：

Zapata-Rodriguez, Carlos J. ^{[1
]}

Vukovic, Slobodan ^{[2
]}

Belic, Milivoj R. ^{[3
]}

Pastor, David ^{[1
]}

Miret, Juan J. ^{[4
]}

机构：

[1] Univ Valencia, Dept Opt, E-46100 Burjassot, Spain

[2] Univ Belgrade, Inst Phys, Zemun 11080, Serbia

[3] Texas A&M Univ Qatar, Doha, Qatar

[4] Univ Alicante, Dept Opt Pharmacol & Anat, E-03080 Alicante, Spain

来源：

OPTICS EXPRESS | 2011年 / 19卷 / 20期

关键词：

DIFFRACTION-FREE BEAMS; NONLINEAR OPTICS; GENERATION; EXCITATION;

D O I：

10.1364/OE.19.019572

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the existence of nondiffracting Bessel surface plasmon polaritons (SPPs), advancing at either superluminal or subluminal phase velocities. These wave fields feature deep subwavelength FWHM, but are supported by high-order homogeneous SPPs of a metal/dielectric (MD) superlattice. The beam axis can be relocated to any MD interface, by interfering multiple converging SPPs with controlled phase matching. Dissipative effects in metals lead to a diffraction-free regime that is limited by the energy attenuation length. However, the ultra-localization of the diffracted wave field might still be maintained by more than one order of magnitude. (C) 2011 Optical Society of America

引用

页码：19572 / 19581

页数：10

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