Absolute brightness measurements in the terahertz frequency range using vacuum and thermal fluctuations as referencesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 22 октября 2014 г.
Аннотация:A total procedure for the terahertz wave
brightness calibration using the quantum fluctuations at
terahertz frequencies as a reference is formulated. An
experimental proof for its theoretical background is pro-
vided. Klyshko method for the brightness calibration using
spontaneous parametric down-conversion is modified,
considering the case when the idler wave hits the terahertz
frequency range and relative additives to the background
signals induced by an external terahertz radiation can be
measured both in Stokes and anti-Stokes ranges. It is
shown at different temperatures that the thermal-fluctua-
tion-induced signals have the same spectral and angular
shapes, as the spontaneous parametric down-conversion
signals, while the thermal-induced signal amplitudes are
proportional to the number of photons in the thermal
equilibrium modes.