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Generation of spontaneous parametric down conversion from BaGa2GeS6 crystalстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 15 апреля 2026 г.
- Авторы: Zatsepin E.S., Veselovskiy A.V., Sabanin A.S., Badikov D.V., Kitaeva G.Kh, Kulik S.P., Paterova A.V.
- Журнал: Laser Physics Letters
- Том: 23
- Номер: 1
- Год издания: 2026
- Издательство: Wiley - VCH Verlag GmbH & CO. KGaA
- Местоположение издательства: Germany
- Первая страница: 015201(1)
- Последняя страница: 015201(7)
- DOI: 10.1088/1612-202x/ae2df9
- Аннотация: Wereport the generation of highly non-degenerate spontaneous parametric down conversion (SPDC) in a novel mid-infrared nonlinear crystal, BaGa2GeS6, and provide a direct experimental comparison with the widely used AgGaS2 crystal. Using a continuous-wave near-infrared (near IR) pump laser, we generate correlated photon pairs with signal wavelengths in the near-IR ∼815 900 nmandidler wavelengths extending deep into the mid-infrared (mid-IR) up to 22–24 µm. Wavelength-angular SPDC spectra are measured for both crystals under identical experimental conditions and analyzed using available dispersion data. Our results demonstrate, for the first time, the efficient generation of correlated photon pairs in BaGa2GeS6 via SPDC. A quantitative comparison shows that BaGa2GeS6 exhibits approximately twice the nonlinear conversion effi ciency of AgGaS2, which is in good agreement with values reported in the literature. In addition, BaGa2GeS6 produces a narrower external SPDC emission cone due to its lower refractive indices, which is advantageous for photon collection and nonlinear interferometric applications. Due to its large effective second-order nonlinearity and broad mid-IR transparency BaGa2GeS6 emerges as a highly promising platform for bright and stable sources of correlated photon pairs. These results establish BaGa2GeS6 as a strong candidate for mid-IR quantum spectroscopy, imaging, and gas sensing applications.
- Добавил в систему: Китаева Галия Хасановна
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