Monday, May 20, 2013

1305.3964 (T. M. Benseman et al.)

Powerful terahertz emission from Bi2Sr2CaCu2O8+delta mesa arrays    [PDF]

T. M. Benseman, K. E. Gray, A. E. Koshelev, W. -K. Kwok, U. Welp, H. Minami, K. Kadowaki, T. Yamamoto
Stacks of intrinsic Josephson junctions (IJJs) in high-temperature superconductors enable the fabrication of compact sources of coherent terahertz radiation. Here we demonstrate that multiple stacks patterned on the same Bi2Sr2CaCu2O8+delta crystal can - under optimized conditions - be synchronized to emit high-power THz-radiation. For three synchronized stacks we achieved 610 microwatts of continuous-wave coherent radiation power at 0.51 THz. We suggest that synchronization is promoted by THz-waves in the base crystal. We note though that synchronization cannot be achieved in all samples. However, even in these cases powers on the 100-microwatt scale can be generated.
View original:

No comments:

Post a Comment