CrossRef Google Scholar  J. The propagation direction and the relative position of the applied optical beams are depicted in Fig. Controlling the quantum states of individual photons with high fidelity is an important field of research in quantum information science.
Hence, the backward case automatically suppresses spontaneous emission in the whole dense medium and greatly improves the CE in resonant FWM processes. The relative energy levels and optical fields are shown in Fig. CrossRef Google Scholar  A. Park, J. B, vol. By contrast, the part of the signal field generated at the trailing edge of the medium passes through the longer medium, leading to greater energy loss as reflected in the rapid decay of the signal pulse.
Moreover, to compare the experimental data with the theoretical predictions, the phase-mismatch effect is included in the theoretical model, which was not considered in an earlier study of backward FWM Martelli, A.
These EIT-based schemes have shown their potential in quantum information science and technology. CrossRef Google Scholar  I.