engleski

Exciton-phonon coupling in individual GaAs nanowires studied using resonant Raman spectroscopy

The Fröhlich coupling strength of individual GaAs nanowires is investigated by resonant micro-Raman spectroscopy measurements near the direct bandgap Eg. Large 2LO/1LO intensities up to 5.7 are observed in an individual GaAs nanowire. A 2LO resonance profile of the GaAs nanowire agrees well with a two-phonon-scattering model, suggesting excitonic scattering. These results advance the understanding of electron-phonon coupling and exciton scattering in quasi-one-dimensional systems and in GaAs at Eg, allowing for the development and optimization of nanowire optoelectronic devices.

Fröhlich coupling ; GaAs ; nanowires

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