Using Raman spectroscopy we studied the InAs-related vibrations of a single
highly strained InAs monolayer embedded in bulk-like GaAs. Experiments wer
e performed in right-angle and forward-scattering configuration with the sc
attered light propagating along the monolayer plane. The energies of the In
As modes are strongly blue-shifted compared to the bulk values. We estimate
the phonon deformation potentials of InAs and obtained the strain in the m
onolayer to be -5%.