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.
@article{arxiv.1305.3964,
title = {Powerful terahertz emission from Bi2Sr2CaCu2O8+delta mesa arrays},
author = {T. M. Benseman and K. E. Gray and A. E. Koshelev and W. -K. Kwok and U. Welp and H. Minami and K. Kadowaki and T. Yamamoto},
journal= {arXiv preprint arXiv:1305.3964},
year = {2015}
}
Comments
17 pages, 4 Figures. Included Supplemental Material contains an additional 4 pages and 4 Figures