Ultrafast dynamics of electronic excitations in semiconductors

✍ Scribed by Thomas Elsaesser; Alfred Leitenstorfer; Tilmann Kuhn; Fausto Rossi

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 460 KB
• Volume: 33
• Category: Article
• ISSN: 0960-8974
• DOI: 10.1016/0960-8974(96)83611-4

✦ Synopsis

Coherent nonlinear i)olarizatio,,s and ,~on-equilil)rium distributions of hot (,h,ctro,,s are stu died in t}'nfl.ose(;on(1 (!xt)(~rim(~ilt.s with bulk GaAs. Itolh excito,fic m,(I Ir,,('-ca.r,i(', (;ore l)onents contril)ute to the third or(let polarizatioll (:los(! to the I)ml(lg~p and show a (listinctly (li[[}~rent tim(, I)cllavior. l)hase r(qa.xation during the femtosccond photog(m(,ra.tion process lc~uls to a signi[icant broadeniug of the iuitiM carrier distribution in comparison to the power N)e(trum ol" the optical pulses. The eXl)erim(mtal .csults a.lC ill cxc(4l(,nt agI'COlll(~II[, with a Monte (',ark) sohflion of the semiconductor Bloch equations.