Modulation depth of series SQUIDs modified by Josephson junction area<sup>

Modulation depth of series SQUIDs modified by Josephson junction area

Liu Jie¹, Gao He^{2, 3}, Li Gang¹, Wei Li Zheng², Ahmada Kamal¹, Ying Shan Zhang¹, Liu Jian She¹, Chen Wei^{1, †}

(color online) (a) The typical optical micrograph of series SQUID device. (b) The typical electric circuit of series SQUID amplifier.