Attosecond clocking of Bloch electrons

We studied the ultrafast dynamics of intersubband polaritons in the mid-infrared together with the groups of Prof. Raffaele Colombelli (Paris), Prof. Christoph Lange (Dortmund) and Prof. Iacopo Carusotto (Trento). Stimulated scattering occurs between these polaritons for resonant excitation, which we observe directly within the polaritonic bandstructure. This scattering mechanism could enable Bose-Einstein-condensates of intersubband polaritons for novel quantum computers and on-chip mid-infrared light sources.

The results have been published in Physical Review Letters.