VOMBAT—On-chip source for entangled photons

Light quanta, so-called photons, are the information carriers of quantum communication and enable, for example, the secure transmission of information based on quantum physical principles. Sources of entangled photon pairs in the frequency range of the low-loss telecommunications bands are essential for the integration of quantum communication into the existing fiber optic infrastructure and the associated long-distance transmission. The aim of the project VOMBAT is to develop a source for entangled photon pairs, in which the required pump source and the generation of the entangled photon pairs are integrated in one chip. This photon pair source will be developed and manufactured on the basis of the material system AlGaAs (aluminum gallium arsenide).