Long-Wavelength Shift in the Operation of Lightly Doped Semiconductor Lasers

Abstract
The observation of a long-wavelength shift in the peak of the photoemission spectra of lightly doped InP and vapor-expitaxial GaAs is reported. It is shown that this long-wavelength shift of the band-edge emission is due to electron-hole-lattice (EHL) interactions. The samples of this work are volume photoexcited in a low-loss high-Q compound optical cavity which permits the observation of recombination radiation at energies E ≥ Eg, as well as at energies E ≤ Eg.