Journal
APPLIED PHYSICS LETTERS
Volume 119, Issue 24, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0074054
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Funding
- Thuringian Ministry for Economy, Science, and Digital Society
- European Social Funds [2017 FGR 0067]
- European Union [899580]
- German Federal Ministry of Education and Research [FKZ 13N14877]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [327470002, 407070005, 398816777-SFB 1375]
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By tuning the pump wavelength, we have successfully achieved phase matching for nondegenerate photon pair generation in a silver gallium sulfide AgGaS2 crystal, generating photon pairs in the mid-infrared and visible spectral ranges. Additionally, we demonstrated photon pair generation with broad spectral bandwidth.
We demonstrate nondegenerate photon pair generation by spontaneous parametric downconversion in a silver gallium sulfide AgGaS2 crystal. By tuning the pump wavelength, we achieve phase matching over a large spectral range. This allows to generate idler photons in the mid-infrared spectral range above a 6 mu m wavelength with corresponding signal photons in the visible. Also, we show photon pair generation with broad spectral bandwidth. These results are a valuable step toward the development of quantum imaging and sensing techniques in the mid-infrared.
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