Wang H B, Guénon S, Yuan J, Iishi A, Arisawa S, Hatano T, Yamashita T, Koelle D, Kleiner R
National Institute for Materials Science, Tsukuba 3050047, Japan.
Phys Rev Lett. 2009 Jan 9;102(1):017006. doi: 10.1103/PhysRevLett.102.017006.
Recently, it has been shown that large stacks of intrinsic Josephson junctions in Bi2Sr2CaCu2O8 emit synchronous THz radiation, the synchronization presumably triggered by a cavity resonance. To investigate this effect we use low temperature scanning laser microscopy to image electric field distributions. We verify the appearance of cavity modes at low bias and in the high input-power regime we find that standing-wave patterns are created through interactions with a hot spot, possibly pointing to a new mode of generating synchronized radiation in intrinsic Josephson junction stacks.
最近的研究表明，Bi2Sr2CaCu2O8中大量的本征约瑟夫森结堆栈会发射同步太赫兹辐射，这种同步可能是由腔共振触发的。为了研究这种效应，我们使用低温扫描激光显微镜对电场分布进行成像。我们在低偏置下验证了腔模的出现，并且在高输入功率 regime 中发现驻波模式是通过与热点的相互作用产生的，这可能指向本征约瑟夫森结堆栈中产生同步辐射的一种新模式。
