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Stokes-anti-Stokes correlations in diamond.
Optics Letters
|September 23, 2015
Summary
We observed quantum correlations between Stokes (S) and anti-Stokes (aS) Raman photons in diamond. This indicates shared phonon excitation, with aS photon generation influenced by S photons at low laser powers.
Area of Science:
- Quantum optics
- Solid-state physics
- Photonics
Background:
- Raman scattering in solids generates Stokes (S) and anti-Stokes (aS) photons.
- Understanding photon correlations is key to quantum information processing.
Purpose of the Study:
- Investigate arrival statistics of S and aS Raman photons in diamond.
- Characterize quantum correlations and their dependence on laser power.
Main Methods:
- Experimental generation of S and aS photons in thin diamond crystals.
- Measurement of intensity cross-correlation function g(S,aS)(2)(0).
- Analysis of photon coincidence rates as a function of laser power.
Main Results:
- Observed strong quantum correlations between S and aS photons.
- Demonstrated shared phonon excitation between S and aS processes.
- Intensity cross-correlation saturates at low laser power, indicating S-induced aS photon generation.
- Coincidence rate shows quadratic and cubic power dependence at high powers.
Conclusions:
- Quantum correlations confirm shared phonon dynamics in diamond Raman scattering.
- Low-power behavior reveals significant contribution of S-induced aS photon generation.
- High-power regime indicates multi-photon generation per pulse.
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