Physics of the Solid State
Development of the physical principles of the design and implementation of a 500–700 GHz spectrometer with a superconducting integrated receiver
В. Л. Вакс, Vladimir Yu. Balakirev, А. Н. Панин, Sergey I. Pripolzin, V. P. Koshelets, Oleg S. Kiselev
Abstract
A spectrometer based on the effect of freely decaying polarization in the frequency range 500–700 GHz has been designed. Radiation sources are harmonics from a quantum semiconductor superlattice frequency multiplier. The receiving system of this spectrometer is constructed using a superconducting integrated receiver based on a superconductor-insulator-superconductor mixer and a flux-flow oscillator operating as a heterodyne oscillator. The spectrometer has been used to measure absorption lines of NH 3 in a sample of expired air (572 GHz).