Polarization property of terahertz wave emission from gammadion-type photoconductive antennas

被引：7
|
作者：
Suo, Hiromasa [1 ]
Takano, Keisuke [2 ]
Ohno, Seigo [1 ]
Kurosawa, Hiroyuki [1 ]
Nakayama, Kazuyuki [1 ]
Ishihara, Teruya [1 ]
Hangyo, Masanori [2 ]
机构：
[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
[2] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 11期
基金：
日本学术振兴会;
关键词：
ELLIPTIC POLARIZATION; RADIATION; SYSTEM;
D O I：
10.1063/1.4820821
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have investigated the polarization property of terahertz (THz) wave emission from gammadion-type photoconductive antennas (PCAs). It was experimentally shown that the polarization of emitted THz wave from the gammadion-type PCAs was elliptic. Finite difference time domain simulation reproduces the experimental observation fairly well. From simulation, we find out that the gammadion-type PCAs have two kinds of radiation; i.e., the radiation from the gap of the PCA and the radiation from the bends of electrode. These two kinds of radiation have different polarization and different time delay, which results in the observed elliptic polarization. (C) 2013 AIP Publishing LLC.
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页数：4
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