Sub-wavelength energy concentration with electrically generated mid-infrared surface plasmons

被引：7

作者：

Bousseksou, A. ^{[1
]}

Babuty, A. ^{[2
]}

Tetienne, J-P. ^{[1
]}

Moldovan-Doyen, I. ^{[2
]}

Braive, R. ^{[3
]}

Beaudoin, G. ^{[3
]}

Sagnes, I. ^{[3
]}

De Wilde, Y. ^{[2
]}

Colombelli, R. ^{[1
]}

机构：

[1] Univ Paris 11, Inst Elect Fondamentale, CNRS, UMR8622, F-91405 Orsay, France

[2] ESPCI ParisTech, Inst Langevin, CNRS, UMR 7587, F-75005 Paris, France

[3] CNRS, Lab Photon & Nanostruct, UPR20, F-91460 Marcoussis, France

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 13期

关键词：

POLARITONS;

D O I：

10.1364/OE.20.013738

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

While freely propagating photons cannot be focused below their diffraction limit, surface-plasmon polaritons follow the metallic surface to which they are bound, and can lead to extremely sub-wavelength energy volumes. These properties are lost at long mid-infrared and THz wavelengths where metals behave as quasi-perfect conductors, but can in principle be recovered by artificially tailoring the surface-plasmon dispersion. We demonstrate - in the important mid-infrared range of the electromagnetic spectrum - the generation onto a semiconductor chip of plasmonic excitations which can travel along long distances, on bent paths, to be finally focused into a sub-wavelength volume. The demonstration of these advanced functionalities is supported by full near-field characterizations of the electromagnetic field distribution on the surface of the active plasmonic device. (C) 2012 Optical Society of America

引用

页码：13738 / 13747

页数：10

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