Graphene-Based Photoconductive Antenna Structures for Directional Terahertz Emission

被引：21

作者：

Nissiyah, G. Jemima ^{[1
]}

Madhan, M. Ganesh ^{[1
]}

机构：

[1] Anna Univ, Dept Elect Engn, MIT Campus, Chennai 600044, Tamil Nadu, India

来源：

PLASMONICS | 2019年 / 14卷 / 04期

关键词：

Terahertz; Surface plasmons; Graphene; FDTD; Femtosecond lasers; Photoconductive antennas; THz sensing; PATCH ANTENNA; BAND;

D O I：

10.1007/s11468-018-0871-7

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：

Graphene-based photoconductive antenna structures for optically excited terahertz (THz) emission is reported. Initially, a dipole antenna is designed using plasmonic graphene material on GaAs substrate, and its characteristics are found to be better than the previously reported structures. Further, the dipole antenna was improved to a Yagi-Uda-type photoconductive antenna, to obtain a focused radiation pattern. The proposed THz Yagi-Uda antenna is simulated and found to provide a gain of 8.64dBi and a directivity of 9.57dBi. Effect of the applied DC bias on the proposed graphene-based dipole and Yagi-Uda photoconductive antennas are also analyzed, and their emission intensities are obtained.

引用

页码：891 / 900

页数：10

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