Cherenkov polaritonic radiation in a natural hyperbolic material

被引：27

作者：

Tao, Jin ^{[1
,2
]}

Wu, Lin ^{[1
,2
]}

Zheng, Guoxing ^{[1
,2
,3
]}

Yu, Shaohua ^{[1
,2
]}

机构：

[1] China Informat Commun Technol Grp Corp, State Key Lab Opt Commun Technol & Networks, Wuhan 430205, Hubei, Peoples R China

[2] China Informat Commun Technol Grp Corp, Natl Informat Optoelect Innovat Ctr, Wuhan 430205, Hubei, Peoples R China

[3] Wuhan Univ, Elect Informat Sch, Wuhan 430072, Hubei, Peoples R China

来源：

CARBON | 2019年 / 150卷

基金：

中国国家自然科学基金;

关键词：

PHONON POLARITONS; PLASMON;

D O I：

10.1016/j.carbon.2019.04.106

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The existence of the forward and the reverse Cherenkov radiation for phonon polaritons (PhPs) in a natural hyperbolic material is theoretically demonstrated. It is shown that the forward and reverse Cherenkov polaritonic radiation can be simultaneously excited by an electron at a low velocity moving above a hexagonal boron nitride (hBN) layer within its upper and lower bands, respectively. The results show that the wavelength of polaritons radiation can be tuned by changing the thickness of the hBN layer and the radiation angles can be controlled by velocity of the moving electron. The proposed approach avoids the high velocity threshold of charged particle in conventional materials and complex fabrication of artificial metamaterials, opening a possibility of applications for polariton source, infrared spectroscopy and photonic integrated circuits, and offering a platform to investigate the light-matter interactions in nanoscale. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：136 / 141

页数：6

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