Continuous 30 mu W terahertz source by a high-T-c superconductor mesa structure
Abbreviated Journal Title
Appl. Phys. Lett.
JOSEPHSON-JUNCTION ARRAYS; SINGLE-CRYSTALS; THZ RADIATION; BI2SR2CACU2O8+DELTA; EMISSION; GENERATION; MILLIMETER; EMITTERS; Physics, Applied
Using a modified mesa structure of high-T-c superconducting Bi2Sr2CaCu2O8+delta with a thin underlaying base superconductor (similar to 3 mu m), the effective working temperature of the continuous and monochromatic terahertz emitter is extended up to 70 K, and the maximum power of similar to 30 mu W at 0.44 THz is achieved at the relatively high temperature of T-b = 55 K in a low bias current retrapping region. The diverging behavior of the intensity occurring at 55 K in the low current regime without hot spot formation may provide us an important clue for the stronger THz radiation from intrinsic Josephson junction devices. (C) 2013 AIP Publishing LLC.
Applied Physics Letters
"Continuous 30 mu W terahertz source by a high-T-c superconductor mesa structure" (2013). Faculty Bibliography 2010s. 4671.