Ie. Perakis et Ds. Chemla, AC STARK-EFFECT OF THE FERMI-EDGE SINGULARITY - OBSERVATION OF EXCITONIC POLARONS, Physical review letters, 72(20), 1994, pp. 3202-3205
We introduce a new theoretical approach to describe the virtual excita
tion of Fermi edge singularities in modulation-doped quantum wells. We
discuss how ultrashort laser pulses renormalize the effective masses,
band-gap, transition matrix elements, and interactions of doped semic
onductors.