Powerful coherent terahertz emission from $\rm{Bi_{2}Sr_{2}CaCu_{2}O_{8+\delta}}$ mesa array
ORAL
Abstract
Stacks of intrinsic Josephson junctions (IJJs) in high-temperature superconductors enable the fabrication of compact sources of coherent THz-radiation. Here we demonstrate 150 microwatts of radiation power at 0.51 THz, using three synchronized stacks patterned on a single $\rm{Bi_{2}Sr_{2}CaCu_{2}O_{8+\delta}}$ crystal. The emitted power scales roughly as the square of the number of energized stacks, while the total power spectrum is monochromatic to within observational limits. These results imply that the stacks radiate coherently.
*This research was funded by the Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
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