Gs. Horner et al., POLARIZED PHOTOLUMINESCENCE MEASUREMENTS OF THE VALENCE-BAND SPLITTING IN SINGLE-VARIANT, SPONTANEOUSLY ORDERED GAINP(2), Physical review. B, Condensed matter, 48(7), 1993, pp. 4944-4947
In this paper, polarized photoluminescence is used to study the GAMMA-
point valence-band structure of single-variant, spontaneously ordered
GaInP2. A laser beam is focused onto the {110} cleaved edges of the ep
ilayer, and the resultant photoluminescence is analyzed in the backsca
ttering geometry. This ''edge-on'' arrangement allows us to access dir
ectly the polarization selection rules both parallel and perpendicular
to the ordering axis, and it shows that the axis is [111BAR], in agre
ement with transmission-electron-diffraction measurements. This spectr
oscopic technique does not require the use of deconvolution methods to
resolve the transition from the conduction band to the crystal-field
valence band, and as such provides a direct measurement of the CuPt se
lection rules and valence-band splitting in GaInP2.