Rydberg excitons in the presence of an ultralow-density electron-hole plasma

J. Heckötter, M. Freitag, D. Fröhlich +7

We use two-color pump-probe spectroscopy to study Rydberg excitons in Cu${}_2$O in the presence of free carriers injected by above-band-gap excitation. Already at plasma densities $ρ…