Graphene-loaded metal wire grating for deep and broadband THz modulation in total internal reflection geometry

被引：0

作者：

YIWEN SUN ^{[1
]}

RICCARDO DEGLINNOCENTI ^{[2
]}

DAVID ARITCHIE ^{[2
]}

HARVEY EBEERE ^{[2
]}

LONG XIAO ^{[2
,3
]}

MICHAEL RUGGIERO ^{[4
]}

JAXEL ZEITLER ^{[5
]}

RAYKO ISTANTCHEV ^{[6
]}

DANNI CHEN ^{[7
]}

ZHENGCHUN PENG ^{[7
]}

EMMA MACPHERSON ^{[6
,8
]}

XUDONG LIU ^{[1
]}

机构：

[1] National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, School of Medicine, Shenzhen University

[2] Cavendish Laboratory, University of Cambridge

[3] Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology

[4] Department of Chemistry, University of Vermont

[5] Department of Chemical Engineering and Biotechnology, University of Cambridge

[6] Department of Electronic Engineering, The Chinese University of Hong Kong

[7] Key Laboratory of Ministry of Education for Optoelectronic Devices and Systems, College of Optoelectronic Engineering, Shenzhen University

[8] Department of Physics, University of Warwick

来源：

Photonics Research | 2018年 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

THz; Graphene-loaded metal wire grating for deep and broadband THz modulation in total internal reflection geometry; TIR;

D O I：

暂无

中图分类号：

TN761 [调制技术与调制器];

学科分类号：

080902 ;

摘要：

We employed a metallic wire grating loaded with graphene and operating in total internal reflection （TIR） geometry to realize deep and broadband THz modulation. The non-resonant field enhancement effect of the evanescent wave in TIR geometry and in the subwavelength wire grating was combined to demonstrate a ～77% modulation depth （MD） in the frequency range of 0.2–1.4 THz. This MD, achieved electrically with a SiO2∕Si gated graphene device, was 4.5 times higher than that of the device without a metal grating in transmission geometry. By optimizing the parameters of the metallic wire grating, the required sheet conductivity of graphene for deep modulation was lowered to 0.87 mS. This work has potential applications in THz communication and real-time THz imaging.

引用

页码：1151 / 1157

页数：7

共 2 条

[1]

Exploiting a metal wire grating in total internal reflection geometry to achieve achromatic polarization conversion[J]. XUDONG LIU,XUEQUAN CHEN,EDWARD P.J.PARROTT,EMMA PICKWELL-MACPHERSON.Photonics Research. 2017(04)

[2] OPTICAL-PROPERTIES OF A METAL-FILM AND ITS APPLICATION AS AN INFRARED ABSORBER AND AS A BEAM SPLITTER [J].

BAUER, S .

AMERICAN JOURNAL OF PHYSICS, 1992, 60 (03) :257-261

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