Dynamic localization versus photon-assisted transport in semiconductor   superlattices driven by dc-ac fields
  Via the numerical analysis on the intraband dynamics of optically excited semiconductor superlattices, we find that time-integrated squared THz emission signals can be used for probing both dynamic localization and multi-photon resonance in the coherent regime. Competition effect between dynamic localization and photon-assisted transport has also been discussed. 
W.-X. Yan, S.-Q. Bao, X.-G. Zhao