Investigation of GaP Based Nanowires Optical Properties for Lasing Applications

摘要

This research is focused on the study and characterization of gallium phosphide based nanowires optical properties. Samples were grown by molecular beam epitaxy on Si (111) substrate and transferred to Menzel’s slide for optical measurements. Two different samples containing core-shell and axially heterostructured nanowires are studied. Analysis of the photoluminescence spectra demonstrate that depending on the NW geometry it can act as a Fabry-Perot cavity and provide good waveguiding properties. Emission spectra of the nanowires demonstrate high resistance to the excitation power. Investigation of the core-shell nanowire Raman spectra demonstrate shift of the TO mode with intense illumination due to possible strain effects induced by the temperature increase.