Spatial interplay of two four-wave mixing images

Abstract

We investigate the interplay between the two components of the four-wave mixing (FWM) beams in a laddertype three-level atomic system. The interplay, including the shift and splitting of the two FWM beams and their intensity modulation, depends on the frequency detuning and the angles as well as the powers of the pump fields. The x-directional splitting due to the cross-phase modulation and y-directional splitting because of electromagnetically induced gratings of FWM beams are investigated. Both the theoretical and experimental results exhibit that the spatial separation and the number of the FWM signals can be well controlled by additional dressing laser beams. Such studies not only can be very useful in better understanding the formation of spatial solitons but also have potential applications in signal processing.

Assembly of an A6L6 Anion Trigonal Antiprism and Binding of Glucopyranosides and Polyethylene Glycols (PEGs)

“…Instead, treatment of L 2S with (TEA) 3 PO 4 resulted in the A 4 L 4 tetrahedron with the ΛΛΛΛ‐ T2S configuration as proved by 1 H NMR (Figure S42), DOSY (Figure S44 and S45), ESI‐MS (Figure S46), CD (Figure S47–S49), and semi‐empirical calculations (Figure S43). A similar phenomenon was also observed in the system of the A 8 L 12 bicapped trigonal antiprism, wherein the similar chiral ligands formed the smaller, enantiopure triple helicate or tetrahedron [15] . This might be attributed to the weaker anion binding affinity of the chiral ligands due to the lack of the electron‐withdrawing nitrophenyl groups, which led to the entropically more favored small assemblies [16]…”