Direct detection effect in small volume hot electron bolometer mixers

We measure the direct detection effect in a small volume (0.15??m×1??m×3.5?nm) quasioptical NbN phonon cooled hot electron bolometer mixer at 1.6?THz. We find that the small signal sensitivity of the receiver is underestimated by 35% due to the direct detection effect and that the optimal operating point is shifted to higher bias voltages when...

Doubling of sensitivity and bandwidth in phonon cooled hot electron bolometer mixers

We demonstrate that the performance of NbN lattice cooled hot electron bolometer mixers depends strongly on the interface quality between the bolometer and the contact structure. We show experimentally that both the receiver noise temperature and the gain bandwidth can be improved by more than a factor of 2 by cleaning the interface and adding...

Thermal time constant of Nb diffusion-cooled superconducting hot-electron bolometer mixers

Nb superconducting hot electron bolometer mixers coupled with microstrip lines

Superconducting transition metal nitride films for THz SIS mixers

Lateral-superlattice effect on weak localization in silicon inversion layers

One-dimensional subband effects in the conductance of multiple quantum wires in Si metal-oxide-semiconductor field-effect transistors