Plasmonic efficiency enhancement at the anode of strip line photoconductive terahertz emitters

被引：14
|
作者：
Singh, Abhishek [1 ]
Winnerl, Stephan [1 ]
Koenig-Otto, Jacob C. [1 ,2 ]
Stephan, Daniel R. [1 ,2 ]
Helm, Manfred [1 ,2 ]
Schneider, Harald [1 ]
机构：
[1] Helmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, Bautzner Landstr 400, D-01314 Dresden, Germany
[2] Tech Univ Dresden, Inst Appl Phys, D-01062 Dresden, Germany
来源：
OPTICS EXPRESS | 2016年 / 24卷 / 20期
关键词：
GENERATION; OPTOELECTRONICS; ANTENNAS; DIPOLE; GAAS;
D O I：
10.1364/OE.24.022628
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate strip line photoconductive terahertz (THz) emitters in a regime where both the direct emission of accelerated carriers in the semiconductor and the antenna-mediated emission from the strip line play a significant role. In particular, asymmetric strip line structures are studied. The widths of the two electrodes have been varied from 2 mu m to 50 mu m. The THz emission efficiency is observed to increase linearly with the width of the anode, which acts here as a plasmonic antenna giving rise to enhanced THz emission. In contrast, the cathode width does not play any significant role on THz emission efficiency. (C) 2016 Optical Society of America
引用
收藏
页码：22628 / 22634
页数：7
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