Abstract

We show that time-resolved IR reflection and transmission studies of carrier dynamics are more sensitive to the details of dynamics than are reflection¹ or Raman² studies using visible wavelengths. The first reason is that the combination of reflection and transmission measurements provides two independent measurements of the spatial profile of carriers. Second, the IR measures the total carrier density and a spatial Fourier component of the carrier density—both of which are intrinsically more sensitive to the fit parameters than are visible probes, which measure the carrier density at the surface.

© 1991 Optical Society of America