Experimental observation of anomalous supralinear response of single-photon detectors

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F23%3A73618554" target="_blank" >RIV/61989592:15310/23:73618554 - isvavai.cz</a>
Result on the web
<a href="https://pubs.aip.org/aip/apr/article/10/1/011412/2881521/Experimental-observation-of-anomalous-supralinear" target="_blank" >https://pubs.aip.org/aip/apr/article/10/1/011412/2881521/Experimental-observation-of-anomalous-supralinear</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0106987" target="_blank" >10.1063/5.0106987</a>

Result language
angličtina
Original language name
Experimental observation of anomalous supralinear response of single-photon detectors
Original language description
The linearity of single-photon detectors allows accurate optical measurements at low light levels and using non-classical light in spectroscopy, biomedical imaging, optical communication, and sensing. However, in practice, the response of single-photon detectors can exhibit intriguing nonlinear effects that may influence the performed measurements. Here, we demonstrate a direct single-source measurement of the absolute nonlinearity of single-photon detectors with unprecedented accuracy. We discover a surprising supralinear behavior of single-photon avalanche diodes and show that it cannot be explained using known theoretical models. We also fully characterize sub- and supra-linear operation regimes of superconducting nanowire single-photon detectors and uncover the supralinearity under faint continuous illumination. The results identify new detector anomalies that supersede existing knowledge of nonlinear effects at the single-photon level.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10306 - Optics (including laser optics and quantum optics)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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