Four-wave mixing A weak optical signal (red) from a spacecraft transmitter can be amplified noise-free when it encounters two pump waves (blue and green) in a receiver on Earth. (Courtesy: Chalmers ...

The primary mechanisms leading to the production of single and entangled photon pairs revolve around established techniques such as parametric down-conversion, four-wave mixing, and stimulated Raman ...

Left and right Diagram showing how left circularly polarized (LCP) light is converted by the bifocal lens into separated beams of LCP light and right circularly polarized (RCP) light. (Courtesy: Fan ...

which significantly enhanced Four-Wave Mixing (FWM) across a broad wavelength range. This enhancement allows the detection of weak infrared signals, thanks to the quadratic power dependence of the ...

We have demonstrated that arrays of engineered silicon nanoparticles called metasurfaces can convert infrared light into visible light through a frequency mixing process. Such metasurfaces that ...