Two-photon emission (2PE) is a process in which an electron transition between quantum levels occurs through the simultaneous emission of two photons. Two-photon emission is interesting because it ...

Learn more about the science behind blackbodies, which take in all the light that hits them and don’t reflect any back.

According to Einstein’s theory of general relativity, gravitational waves warp spacetime. In the process, they could imprint ...

Photons are uniquely suited for this task because ... a defect might instead cause the atoms to vibrate, reducing the light-emission efficiency. Chris G. Van de Walle, Herbert Kroemer Professor ...

What is Photoluminescence Quantum Yield? Photoluminescence quantum yield (PLQY) is a fundamental parameter that quantifies the efficiency of the photoluminescence process in a material. It is defined ...

“Peat soils have a unique ability to block this type of naturally occurring radiation, drastically reducing the number of ...

Photon upconversion involves a series of non-linear optical processes where the sequential absorption of two or more photons leads to the emission of a single photon with energy greater than the sum ...

This work reports the design of an efficient multiband UC system based on Ln3+/Yb3+-doped core-shell upconversion ...