Abstract:
The electroluminescence spectra of waveguiding struc- tures based on quantum well-dots were investigated with polarization resolution in the temperature range of 60–300 K. It is found that the ground state emission consists of two peaks with different degrees of TE-polarization and these peaks are getting closer with temperature decrease. We attribute the bimodality to the existence of two different types of nanoobjects in the active region: the quantum well-dots, which have partially TE-polarized emission, and quantum dots emitting almost fully TE-polarized light.