|
ИСТИНА |
Войти в систему Регистрация |
ФНКЦ РР |
||
Statistical features of the response of a superconducting hot-electron bolometer to extremely weak terahertz pulses of picosecond and nanosecond durationстатья Исследовательская статья
- Авторы: Novikova T.I., Kuznetsov K.A., Korolev I.V., Pentin I.V., Prudkovskii P.A., Kitaeva G.Kh
- Журнал: Applied Physics Letters
- Том: 125
- Номер: 12
- Год издания: 2024
- Издательство: AIP Publishing
- Местоположение издательства: United States
- Первая страница: 124004-1
- Последняя страница: 124004-6
- DOI: 10.1063/5.0231546
- Аннотация: We study the statistical distributions of the output signals of a superconducting hot-electron bolometer (HEB) detector exposed to weak photon pulses of 1 THz (terahertz) frequency. Pulses with variable photon numbers were generated through strongly non-degenerate parametric downconversion (PDC) in a LiNbO3 crystal at 4.8 K. Fundamental differences in histograms are found between two PDC pumping modes, with pulse widths of 28 ps and 10 ns. HEB response to a picosecond THz pulse was detected in the form of a single elementary electrical pulse (SEP), with the average amplitude proportional to radiation intensity and dispersion relative to the bolometer's dark current. HEB responses to extremely weak radiation intensities have been recorded using nanosecond pulsed illumination. We found that nanosecond histograms are asymmetrical and broaden as radiation intensity increases, indicating that the nanosecond response consists of several SEPs. Poisson–Gauss approximation of histograms indicates that not only the average number of SEPs increase but also the average amplitude of a SEP increases with increasing power of incident THz radiation.
- Добавил в систему: Китаева Галия Хасановна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | APL2024.pdf | 2,0 МБ | 18 сентября 2024 [Kitaeva] |