| Автор | Z D Genchev |
| Автор | R A Chakalov |
| Автор | J D Chern |
| Автор | D Dew-Hughes |
| Дата выпуска | 1996-07-01 |
| dc.description | Thermal detectors which convert the incident radiation to heat are frequently used to give a periodic response to the external signal modulated at a fixed low-frequency chopping frequency. Many workers have ascertained the bolometric response of high-quality epitaxial superconducting films on different substrates to chopped laser radiation. Based on these observations we made an a priori assumption that the voltage response of thin film is entirely due to a thermal mechanism, i.e. in the proposed one-dimensional heat conduction analysis any possible non-equilibrium processes are neglected. A new analytical formula is derived for the mean temperature increase in the superconducting film. This formula generalizes the previously well known analytical approximations. Further we explore a specific numerical example based on experimental data for the optical response of a thin () high- Bi-based film on an substrate irradiated by chopped He - Ne laser radiation ( nm). On the basis of the theory and the chopping frequency dependence of the peak voltage response an implementation of a new diagnostic method for evaluation of the thermal Kapitza conductance at the superconducting film - insulator interface is demonstrated. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Thermal model for the bolometric response of high- superconducting films to chopped optical radiation |
| Тип | paper |
| DOI | 10.1088/0953-2048/9/7/003 |
| Electronic ISSN | 1361-6668 |
| Print ISSN | 0953-2048 |
| Журнал | Superconductor Science and Technology |
| Том | 9 |
| Первая страница | 523 |
| Последняя страница | 528 |
| Выпуск | 7 |
