Strong Coupling in the Far-Infrared between Graphene Plasmons and the Surface Optical Phonons of Silicon Dioxide

被引：80

作者：

Luxmoore, Isaac John ^{[1
]}

Gan, Choon How ^{[1
]}

Liu, Peter Qiang ^{[2
]}

Valmorra, Federico ^{[2
]}

Li, Penglei ^{[1
]}

Faist, Jerome ^{[2
]}

Nash, Geoffrey R. ^{[1
]}

机构：

[1] Univ Exeter, Coll Engn Math & Phys Sci, Exeter EX4 4QF, Devon, England

[2] Swiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, Switzerland

来源：

ACS PHOTONICS | 2014年 / 1卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

CVD graphene; nanoribbons; plasrnonics; infrared spectroscopy; SCATTERING; TERAHERTZ; MOBILITY;

D O I：

10.1021/ph500233s

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We study plasmonic resonances in electrostatically gated graphene nanoribbons on silicon dioxide substrates. Absorption spectra are measured in the mid-far-infrared and reveal multiple peaks, with width-dependent resonant frequencies. We calculate the dielectric function within the random phase approximation and show that the observed spectra can be explained by surface-plasmon-phonon-polariton modes, which arise from coupling of the graphene plasmon to three surface optical phonon modes in silicon dioxide.

引用

页码：1151 / 1155

页数：5

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