Ultrafast asymmetric Rosen-Zener-like coherent phonon responses observed in silicon
Ultrafast asymmetric Rosen-Zener-like coherent phonon responses observed in silicon
We investigate the spectral profiles of time signals attributed to coherent phonon generation in an undoped Si crystal. Here, the retarded longitudinal-optical (LO) phonon Green function relevant to the temporal variance of induced charge density of ionic cores is calculated by employing the polaronic quasiparticle model developed by the authors …