A primary radiation standard based on quantum nonlinear opticsстатья
Статья опубликована в высокорейтинговом журнале
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: 12 февраля 2020 г.
Авторы:
Lemieux Samuel,
Giese Enno,
Fickler Robert,
Chekhova Maria V.,
Boyd Robert W.
Аннотация:The black body remains the most prominent source of light
for absolute radiometry. Its main alternative, synchrotron
radiation, requires costly and large facilities. Quantum optics
offers a new radiometric source: parametric down-conversion
(PDC), a nonlinear optical process, in which pairwise photon
correlations enable absolute calibration of photodetectors.
Since the emission rate crucially depends on the brightness
of the electromagnetic field, quantum-mechanical fluctuations
of the vacuum can be seen as a seed of spontaneous
PDC, and their amplitude is a natural radiometric standard.
Thus, they allow for the calibration of the spectral radiance of
light sources by measuring the ratio between seeded and
unseeded PDC. Here, we directly use the frequency spectrum
of the electromagnetic vacuum to trigger spontaneous PDC
and employ the generated light to infer the spectral response
of a spectrometer over a broad spectral range. Then, we
deduce the absolute quantum efficiency from the spectral
shape of PDC in the high-gain regime, without relying on a
seed or reference detector. Our results compare well with the
ones obtained with a reference lamp, demonstrating a promising
primary radiation standard.