Oral Presentation

High-Performance Nb-AlN-NbN SIS Mixer for the 850 GHz (Remote)

Author(s): Shuqin Wang (PMO) Dong Liu (PMO) Boliang Liu ((PMO) Zheng Wang (PMO) Jing Li (PMO) Shengcai Shi (PMO) Artem Chekushkin (KIREE) Michael Fominsky (KIREE) Lyudmila Filippenko (KIREE) Valery Koshelets (KIREE)

Presenter: Shuqin Wang (Purple Mountain Observatory，Chinese Academy of Sciences)

Superconductor-insulator-superconductor (SIS) mixers are the most sensitive heterodyne receivers in the millimeter and submillimeter wave regime. The recent development of improved Nb/AlN/NbN junctions, which combine a high gap voltage with a high critical current density, provides a pathway to enhance mixer performance at higher frequencies. We have designed and fabricated an SIS mixer employing this technology for the 850 GHz . The receiver demonstrates outstanding noise performance across most of the targeted band, with a measured noise temperature below 400 K.