NbN Hot Electron Bolometric Mixers for a Quasi--Optical THz Receiver
Sammanfattning: Experimental work on the development of a quasi-optical heterodyne receiver for the THz frequency range is reported. The mixing device is a superconducting hot electron bolometer (HEB) made from ultrathin, d = 3 - 5 nm, niobium nitride (NbN) films.
Work described in this thesis comprises:
- The design of a prototype receiver using quasi-optical coupling.
- Device fabrication involving reactive magnetron sputtering of NbN films and lithographic definition of the antenna integrated mixer.
- An investigation of the receiver performance at frequencies between 0.6 THz and 2.5 THz.
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