2015/09/29 by G. Romanov, Gleb Romanov, Chris O'Brien +3
Computer Science · Physics and Astronomy · #Absorption (acoustics) #Atomic and Subatomic Physics Research #Atomic physics #Coupling (piping) #Electromagnetically induced transparency #Field (mathematics) #Four-wave mixing #Laser #Materials science #Mixing (physics) #Nonlinear optics #Optics #Optoelectronics #Photon #Physics #Quantum Information and Cryptography #Quantum mechanics #Quantum optics and atomic interactions #Raman amplification #Raman scattering #Raman spectroscopy #Resonance (particle physics) #SIGNAL (programming language) #physics.optics #quant-ph
paper · pdf · doi:10.1080/09500340.2015.1133856
13 pages, 8 figures
arxiv created 2015/09/29 · openalex publication_date 2016/01/22 · arxiv updated 2016/09/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose a method to controllably suppress the effect of the four-wave mixing caused by the coupling of the strong control optical field to both optical transitions in the Λ system under the conditions of electromagnetically induced transparency (EIT). At sufficiently high atomic density, this process leads to amplification of a weak optical signal field, that is detrimental for the fidelity of any EIT-based quantum information applications. Here we show that an additional absorption resonance centred around the Stokes field frequency, generated in such a four-wave mixing process, may efficiently suppress the unwanted probe amplification without affecting properties of the EIT interaction. We discuss the possibility of creating such tunable absorption using two-photon Raman absorption resonances in the other Rb isotope, and present some preliminary experimental results.