Motion-induced signal revival in pulsed Rydberg four-wave mixing beyond the frozen gas limit
arXiv:1410.0897 · doi:10.1103/PhysRevA.90.053806
Abstract
We present measurements on pulsed four-wave mixing involving a Rydberg state in an atomic vapor cell. The excitation to the Rydberg state is conducted by a pulsed two-photon excitation on the nanosecond timescale that is combined with a third CW laser in phase-matched geometry yielding light emission on the same timescale. An additional signal peak is observed shortly after the pulse that can be attributed to a revival of constructive interference between different velocity classes of the radiating atomic dipoles. Furthermore we investigate the density dependence of the four-wave mixing signal. From the shape of the respective curve we are able to confirm energy and momentum conservation in the photonic part of the system.
arXiv comment7 pages, 5 figures
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- Interference and nonlinear properties of four-wave-mixing resonances in thermal vapor: Analytical results and experimental verification
- Rydberg polaritons in a thermal vapor
- Simultaneous two-photon resonant optical laser locking (STROLLing) in the hyperfine Paschen--Back regime
- Coupling of four-wave mixing and Raman scattering by ground-state atomic coherence
- Phase matching alters spatial multiphoton processes in dense atomic ensembles
- Pulsed Rydberg four-wave mixing with motion-induced dephasing in a thermal vapor
- Superradiant Emission of Ultra-Bright Photon Pairs in Doppler-Broadened Atomic Ensemble