Toward maser action at room temperature by triplet-radical interaction and its application to microwave technology

Abstract

The interaction between photoinduced triplets and stable radicals, in liquid solutions at room temperature, is utilized to control the macroscopic permeability of these systems. Based on a numerical-theoretical treatment, which describes this photoprocess, the changes in the permeability can be optimized by choosing the appropriate chemical system. Presently, it can be demonstrated how these light-driven changes result in noticeable changes in the reflection coefficient (amplitude and phase) of a microwave cavity containing the chemical system. This effect can lead the way to ultra low noise microwave amplifiers and low-loss microwave phase shifters, operating at room temperature with very low spin temperature, e.g., T(sub s) less than 16 K.