Experimental observation of strong light-matter coupling in ZnO   microcavities: influence of large excitonic absorption
  We present experimental observation of the strong light-matter coupling regime in ZnO bulk microcavities grown on silicon. Angle resolved reflectivity measurements, corroborated by transfer-matrix simulations, show that Rabi splittings in the order of 70 meV are achieved even for low finesse cavities. The impact of the large excitonic absorption, which enables a ZnO bulk-like behavior to be observed even in the strong coupling regime, is illustrated both experimentally and theoretically by considering cavities with increasing thickness. 
Fran\c{c}ois M\'edard (LASMEA), Jes\'us Z\'u\~niga-P\'erez (CRHEA),   Pierre Disseix (LASMEA), Martine Mihailovic (LASMEA), ...