RELATION BETWEEN HOT-SPOT FORMATION AND TERAHERTZ RADIATION IN HIGH TEMPERATURE SUPERCONDUCTOR IJJ D

• 作 者: Kazuo Kadowaki Yuuki Shibano Ryo Kaneda Takanari Kashiwagi Chiharu Watanabe Hidetoshi Minami Shunsuke Sekimoto Kazuya Ishida Kentarou Asanuma Kurama Nakade Takaki Yasui Yoshihiko Saiwai
• 机 构: DivisionofMaterialsScience,FacultyofPure&AppliedSciences,UniversityofTsukuba,1-1-1,Tennodai,Tsukuba,
• 出 处: 第二届微波/太赫兹科学与应用国际研讨会(2013 International Symposium on Microwav
• 发表日期: 2013年7期

In 2007, coherent and continuous sub-THz radiation was discovered in mesas of high-Tc superconductor intrinsic Josephson junctions (IJJs) by the DC current drive[1].This current generates gigantic heat (～MW/cm3) when the IJJs are in the resistive state for THz radiation.As a result, the temperature of the mesa rises significantly, sometimes above Tc locally called as a hot-spot, leaving the rest of the mesa being still below Tc.In such a thermal condition, THz radiation can still be found irrespective of the hot-spot formation as far as the necessary conditions for the radiation are satisfied.