高温超导约瑟夫森太赫兹辐射源

High temperature superconducting Josephson terahertz radiation sources

本文回顾了约瑟夫森结阵太赫兹信号源的研究背景和本征约瑟夫森结的发展,详细介绍了高温超导单晶Bi2Sr2CaCu2O8本征约瑟夫森结阵太赫兹源的样品制备、工作原理、自热现象及频率可调性等特性.这种太赫兹辐射源最高工作频率和可调频率范围已分别超过1THz和500GHz,在空间通信、波谱成像、环境监测等方面将会有重要应用.

After giving a brief review on the research background of Josephson THz sources and intrinsic Josephson junctions,I report in details on the THz emitters made of intrinsic Josephson junctions,including fabrication, mechanism,self-heating,frequency tunability,and some other respects.The state-of-art THz emitters,with the operation frequency of over 1 THz and the tunability of over 500 GHz,will find themselves many applications in space communication,spectroscopic imaging,and environment monitoring.