Trapped phonons in the reflection spectra of GaAs/AlGaAs superlattices
Pusen Yu. A. , Milekhin A. G., Sinyukov M. P., Ploog K. , Toropov A. I.
Structural features attributable to the trapping of transverse optical phonons in the layers of GaAs/AlGaAs superlattices have been observed in reflection spectra. The dispersion of TO phonons in AlAs has been measured for the first time.