Using YBa2Cu3O7-δ/MgO bicrystal Josephson junction,we have developed a setup for spectrum analyses of terahertz signals,up to 2.5 THz,with a frequency resolution of 3 GHz.The junction works at liquid nitrogen tempera...Using YBa2Cu3O7-δ/MgO bicrystal Josephson junction,we have developed a setup for spectrum analyses of terahertz signals,up to 2.5 THz,with a frequency resolution of 3 GHz.The junction works at liquid nitrogen temperature when the signal frequencies are low while for signals at 1.6 THz and 2.5 THz the junction is cooled to 6 K.Digital signal processing(DSP)chips are made use of to build a data acquisition and processing system so that it can be compact,fast,and intelligent.With the completion of the relevant hardwares and softwares,the measurements are now automated.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.10874074)in part by the National Basic Research Program of China(Grant Nos.2006CB601006 and 2007CB310404)National High-tech R&D Program of China(Grant No.2006AA03Z214)
文摘Using YBa2Cu3O7-δ/MgO bicrystal Josephson junction,we have developed a setup for spectrum analyses of terahertz signals,up to 2.5 THz,with a frequency resolution of 3 GHz.The junction works at liquid nitrogen temperature when the signal frequencies are low while for signals at 1.6 THz and 2.5 THz the junction is cooled to 6 K.Digital signal processing(DSP)chips are made use of to build a data acquisition and processing system so that it can be compact,fast,and intelligent.With the completion of the relevant hardwares and softwares,the measurements are now automated.
