A primary radiation standard based on quantum nonlinear optics

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autorinnen und Autoren: Lemieux S, Giese E, Fickler R, Chekhova M, Boyd RW
Zeitschrift: Nature Physics
Jahr der Veröffentlichung: 2019
Band: 15
Heftnummer: 6
Seitenbereich: 529-+
ISSN: 1745-2473
eISSN: 1745-2481


The black body remains the most prominent source of light for absolute radiometry(1). Its main alternative, synchrotron radiation, requires costly and large facilities(2). 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(3-6). Since the emission rate crucially depends on the brightness of the electromagnetic field, quantum-mechanical fluctuations of the vacuum(7) 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(8-11) 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.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Chekhova, Maria PD Dr.
Lehrstuhl für Experimentalphysik (Optik)

Einrichtungen weiterer Autorinnen und Autoren

University of Ottawa


Lemieux, S., Giese, E., Fickler, R., Chekhova, M., & Boyd, R.W. (2019). A primary radiation standard based on quantum nonlinear optics. Nature Physics, 15(6), 529-+. https://dx.doi.org/10.1038/s41567-019-0447-2

Lemieux, Samuel, et al. "A primary radiation standard based on quantum nonlinear optics." Nature Physics 15.6 (2019): 529-+.


Zuletzt aktualisiert 2019-19-06 um 08:23