Time-resolved optical characterization of proximized nano-bilayers for ultrafast photodetector applications

Modelling the Relaxation Characteristics of Current- and Optically Controlled Superconducting Switching Elements

“…Therefore, the effect of the transport current was taken into account in the model, on one hand, through its effect on T c and ρ at a given temperature and, on the other, through the heat release (5). In the front of the current pulse a transition from one ρ(T ) curve to the other at a fixed temperature is carried out in the program (Fig.…”

“…T HE phenomena of rapid transition of thin films of high-T c superconductors (HTS) from the superconducting state into the normal metal state and backwards (the S↔N transition) induced by current and optical radiation allow to construct various opto-and cryoelectronic components operating at the liquid nitrogen temperature: high-sensitivity bolometers, switching elements, fault current limiters, microwave filters, etc [1], [2]. While thin films are transmitted to the normal metal state (N), a great influence on the time of superconductivity reproduction is exerted by processes of heat generation and propagation in thin-film structures, which has been noted in many experimental studies [3]- [5]. Nevertheless, determining the relation between the response of HTS films and thermal processes based on the data obtained in experimental research is very difficult, as during experiments several mechanisms changing the film resistance occur, and also because HTS films have diverse parameters in different studies depending on the type of substrate, which has a significant impact on the response characteristics.…”