Antenna processes and photon cutting

A photon cutting process (Wegh et al., 1999) as photon reemission is an example for an antenna process. It includes the emission of two visible photons for each vacuum ultraviolet photon absorbed. For us important, that materials with introduced luminescent activators ensure the separation of the photon antenna reemissions and the photon work production processes. In our opinion, ultra-high efficiencies can be reached if: firstly, we solve the problem of separating the photon antenna reemissions and the photon work production processes. Secondly, one should know a way of transformation of irreversible photon antenna reemissions into reversible. Let us consider the activator states in an absorber as state 3. A photon cutting process is irreversible in case of the reemissions (1231)n. They can be luminescent. A photon cutting process can be reversible if an activator performs the reemissions (1231321)n. They cannot be luminescent. An absorber with such activators can resemble a black body. Therefore, photon cutting processes can also play a role in transformation of irreversible reemission into reversible. This way is one of many others.