title: Demonstration of a fully integrated superconducting receiver with a 2.7 THz quantum cascade laser.
abstract: We demonstrate for the first time the integration of a superconducting hot electron bolometer (HEB) mixer and a quantum cascade laser (QCL) on the same 4-K stage of a single cryostat, which is of particular interest for terahertz (THz) HEB/QCL integrated heterodyne receivers for practical applications. Two key issues are addressed. Firstly, a low power consumption QCL is adopted for preventing its heat dissipation from destroying the HEB's superconductivity. Secondly, a simple spherical lens located on the same 4-K stage is introduced to optimize the coupling between the HEB and the QCL, which has relatively limited output power owing to low input direct current (DC) power. Note that simulation techniques are used to design the HEB/QCL integrated heterodyne receiver to avoid the need for mechanical tuning. The integrated HEB/QCL receiver shows an uncorrected noise temperature of 1500 K at 2.7 THz, which is better than the performance of the same receiver with all the components not integrated.
authors.forename: Wei
authors.initials: W
authors.lastname: Miao
authors.forename: Zheng
authors.initials: Z
authors.lastname: Lou
authors.forename: Gang-Yi
authors.initials: GY
authors.lastname: Xu
authors.forename: Jie
authors.initials: J
authors.lastname: Hu
authors.forename: Shao-Liang
authors.initials: SL
authors.lastname: Li
authors.forename: Wen
authors.initials: W
authors.lastname: Zhang
authors.forename: Kang-Min
authors.initials: KM
authors.lastname: Zhou
authors.forename: Qi-Jun
authors.initials: QJ
authors.lastname: Yao
authors.forename: Kun
authors.initials: K
authors.lastname: Zhang
authors.forename: Wen-Ying
authors.initials: WY
authors.lastname: Duan
authors.forename: Sheng-Cai
authors.initials: SC
authors.lastname: Shi
authors.forename: Raffaele
authors.initials: R
authors.lastname: Colombelli
authors.forename: Harvey E
authors.initials: HE
authors.lastname: Beere
authors.forename: David A
authors.initials: DA
authors.lastname: Ritchie