Stokes-anti-Stokes correlations in diamond

We investigate the arrival statistics of Stokes (S) and anti-Stokes (aS) Raman photons generated in thin diamond crystals. Strong quantum correlations between the S and aS signals are observed, which implies that the two processes share the same phonon; that is, the phonon excited in the S process i...

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Bibliographic Details
Published inOptics letters Vol. 40; no. 10; p. 2393
Main Authors Kasperczyk, Mark, Jorio, Ado, Neu, Elke, Maletinsky, Patrick, Novotny, Lukas
Format Journal Article
LanguageEnglish
Published United States 15.05.2015
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ISSN1539-4794
DOI10.1364/OL.40.002393

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Summary:We investigate the arrival statistics of Stokes (S) and anti-Stokes (aS) Raman photons generated in thin diamond crystals. Strong quantum correlations between the S and aS signals are observed, which implies that the two processes share the same phonon; that is, the phonon excited in the S process is consumed in the aS process. We show that the intensity cross-correlation g(S,aS)(2)(0), which describes the simultaneous detection of Stokes and anti-Stokes photons, increases steadily with decreasing laser power and saturates at very low pump powers, implying that the number of Stokes-induced aS photons is comparable to the number of spontaneously generated aS photons. Furthermore, the coincidence rate shows a quadratic plus cubic power dependence, indicating the generation of multiple S photons per pulse at high powers.
ISSN:1539-4794
DOI:10.1364/OL.40.002393