The threshold excitation photon energy required to achieve an observable up-conversion photoluminescence reaching ca. 1.3 eV amounted to 1.03–1.08 eV. A diagram showing excitation and ...

This allows the events from each individual laser flash to be analyzed in terms of photon energy, yielding spectrally high-resolution data sets. Helium, as the simplest and most accessible multi ...

By grouping these possibilities into distinct sets, the Birmingham team has been able to produce a model that describes not only the interactions between the photon and the emitter, but also how the ...

Photons appear and disappear randomly within the cavity due to tiny energy fluctuations in space that cause quantum particles to blink in and out of existence. However, once there, the photon is ...

More efficient solar cells would lead to wider use of this clean energy source." When a photon is absorbed, its energy takes the form of an exciton inside the material. Bardeen explained that ...