Linear electro-optic photoreflectance spectra of GaAs and CdTe around E1 and E1 Δ1 Article uri icon

abstract

  • We report on the measurement of linear electro-optic (LEO) photoreflectance (PR) spectra for both GaAs and CdTe (001) crystals. It is found that the amplitude of the LEO spectra is directly related to the sample doping level, while the sign of these spectra is dependent on the conductivity type of the sample. GaAs LEO spectral lineshapes, in contrast, are found to be independent of the conductivity type in the 1015 to 1017 cm-3 impurity range. These facts, along with a precise theoretical understanding of the LEO spectra, allow for the use of LEO-PR spectroscopy for the characterization of surface and interface electric fields.

publication date

  • 1999-01-01