We have observed a direct correlation between nonspherical shape and polarization anisotropy of optical transitions in quantum dots. The dots, grown by self-assembling during epitaxial deposition of InAs on (Formula presented) exhibit a nonconventional, faceted, arrowheadlike shape aligned in the [2¯33] direction. The dot photoluminescence emission is partially (Formula presented) polarized along the same [2¯33] direction. The presence and the sign of the emission polarization is in agreement with the predictions of a theoretical model. Full morphological and optical characterization is reported. © 1998 The American Physical Society.
Henini, M., Sanguinetti, S., Fortina, S., Grilli, E., Guzzi, M., Panzarini, G., et al. (1998). Optical Anisotropy in Arrow-Shaped InAs Quantum Dots. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 57(12), R6815-R6818 [10.1103/PhysRevB.57.R6815].
Optical Anisotropy in Arrow-Shaped InAs Quantum Dots
SANGUINETTI, STEFANO;GRILLI, EMANUELE ENRICO;GUZZI, MARIO;
1998
Abstract
We have observed a direct correlation between nonspherical shape and polarization anisotropy of optical transitions in quantum dots. The dots, grown by self-assembling during epitaxial deposition of InAs on (Formula presented) exhibit a nonconventional, faceted, arrowheadlike shape aligned in the [2¯33] direction. The dot photoluminescence emission is partially (Formula presented) polarized along the same [2¯33] direction. The presence and the sign of the emission polarization is in agreement with the predictions of a theoretical model. Full morphological and optical characterization is reported. © 1998 The American Physical Society.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
