Substrate carrier concentration dependent plasmon-phonon coupled modes at the interface between graphene and semiconductors

被引：1

作者：

Wang, Lei ^{[1
,2
,3
,4
]}

Cai, Wei ^{[1
,2
,4
]}

Niu, Linyu ^{[1
,2
,4
]}

Luo, Weiwei ^{[1
,2
,4
]}

Ma, Zenghong ^{[1
,2
,4
]}

Du, Chenglin ^{[1
,2
,4
]}

Xue, Shuqing ^{[1
,2
,4
]}

Zhang, Xinzheng ^{[1
,2
,4
]}

Xu, Jingjun ^{[1
,2
,4
]}

机构：

[1] Nankai Univ, TEDA Appl Phys Inst, Key Lab Weak Light Nonlinear Photon, Minist Educ, Tianjin 300457, Peoples R China

[2] Nankai Univ, Sch Phys, Tianjin 300457, Peoples R China

[3] Xinyang Normal Univ, Coll Phys & Elect Engn, Xinyang 464000, Peoples R China

[4] Synerget Innovat Ctr Chem Sci & Engn, Tianjin 300071, Peoples R China

来源：

OPTICS EXPRESS | 2015年 / 23卷 / 23期

基金：

中国国家自然科学基金;

关键词：

GAAS;

D O I：

10.1364/OE.23.029533

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The coupled modes between graphene plasmons and surface phonons of a semiconductor substrate are investigated, which can be efficiently controlled by carrier injection of the substrate. A new physical mechanism on tuning plasmon-phonon coupled modes (PPCMs) is proposed due to the fact that the energy and lifetime of substrate surface phonons depend a lot on the carrier concentration. Specifically, the change of dispersion and lifetime of PPCMs can be controlled by the carrier concentration of the substrate. The energy of PPCMs for a given momentum increases as the carrier concentration of the substrate increases. On the other hand, the momentum of PPCMs for a given energy decreases when the carrier concentration of the substrate increases. The lifetime of PPCMs is always larger than the intrinsic lifetime of graphene plasmons without plasmon-phonon coupling. (C) 2015 Optical Society of America

引用

页码：29533 / 29542

页数：10

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