Efficient Terahertz Photoconductive Emitters with Improved Electrode Structures

Efficient Terahertz Photoconductive Emitters with Improved Electrode Structures

We present the design, fabrication, and characterization of two new types of terahertz photoconductive emitters. One has an asymmetric four-contact electrode structure and the other has an arc-shaped electrode structure, which are all modified from a traditional strip line antenna. Numerical simulat...

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Veröffentlicht in:电子科技学刊 2014, Vol.12 (2), p.156-160
1. Verfasser: Ying-Xin Wang Yi-Jie Niu Wei Cheng Zhi-Qiang Li Zi-Ran Zhao
Format: Artikel
Sprache:eng
Schlagworte:
光发射器
光电导
太赫兹波
实验观察
改良
数值模拟
电极结构
辐射效率
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description We present the design, fabrication, and characterization of two new types of terahertz photoconductive emitters. One has an asymmetric four-contact electrode structure and the other has an arc-shaped electrode structure, which are all modified from a traditional strip line antenna. Numerical simulations and real experiments confirm the good performance of the proposed antennas. An amplitude increase of about 40% is experimentally observed for the terahertz signals generated from the new structures. The special electrode structure and its induced local bias field enhancement are responsible for this radiation efficiency improvement. Our work demonstrates the feasibility of developing highly efficient terahertz photoconductive emitters by optimizing the electrode structure.
doi_str_mv 10.3969/j.issn.1674-862X.2014.02.004
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subjects 光发射器
光电导
太赫兹波
实验观察
改良
数值模拟
电极结构
辐射效率
title Efficient Terahertz Photoconductive Emitters with Improved Electrode Structures
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