Noise temperature distribution of superconducting hot electron bolometer mixers

Zhou Kang-Min^{1, 2}, Miao Wei^{1, 2}, Geng Yue^{1, 2, 4}, Delorme Yan³, Zhang Wen^{1, 2}, Ren Yuan^{1, 2}, Zhang Kun^{1, 2}, Shi Sheng-Cai^{1, 2, †}

The I–V curves at different pumping levels at (a) 0.2 THz and (b) 0.85 THz, negative resistance can still be found even at well-pumped I–V curves at 0.2 THz.