Quasiparticle Formation and Decay in Pulsed Photoexcitation of Disordered Semiconductors
A. Kalvováa and B. Velickýa,b
aInst. of Phys., Czech Academy of Sciences, Na Slovance 2, 180 40 Praha 8, Czech Republic
bFaculty of Math. and Phys., Charles University, Ke Karlovu 5, 121 16 Praha 2, Czech Republic
Full Text PDF
The quasiparticle states in strongly illuminated semiconductors are light hybridized electron and hole states, Galickii quasiparticles. Their properties, especially if they are photoexcited at small detunings, may be rather complex. A protracted formation period is followed by quantum beats of two decaying resonances corresponding to both sides of the hybridization gap. On an example of elastic scattering on an alloy disorder, these phenomena are demonstrated and analyzed in terms of poles of the retarded Green function and the corresponding residuals.
DOI: 10.12693/APhysPolA.92.809
PACS numbers: 71.55.Eq, 72.10.Bg, 78.47.+p