Surface optical phonon-assisted exciton photoluminescence spectroscopy in Q1D AlN nanostructures

Mechanisms and influence factors of surface optical (SO) phonon-mode-assisted exciton photoluminescence (PL) spectroscopy in quasi-1-dimensional (Q1D) nitride nanostructures remain a subject of debate. In this work, using momentum and energy conservation laws, a constraint relationship for the frequ...

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Published inApplied physics letters Vol. 123; no. 13
Main Authors Zhang, Li, Liang, Z. W., Liu, Q., Yang, A. L., Shi, Jun-Jie, Wang, Qi
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 25.09.2023
Subjects
Applied physics
Excitation spectra
Excitons
Nanostructure
Nanowires
Phonons
Photoluminescence
Spectroscopy
Wavelengths
Wurtzite
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Summary:Mechanisms and influence factors of surface optical (SO) phonon-mode-assisted exciton photoluminescence (PL) spectroscopy in quasi-1-dimensional (Q1D) nitride nanostructures remain a subject of debate. In this work, using momentum and energy conservation laws, a constraint relationship for the frequency and wave number of SO phonon-mode-assisted exciton PL is established. Using the dispersion relationships of SO modes in anisotropic wurtzite nanowires, the frequency and wave number of SO-mode-assisted exciton PL emission are determined. The present theoretical scheme and numerical results not only explain a current experimental discrepancy but could also be used to predict and design exciton PL spectroscopy with SO phonon modes in Q1D nanostructures.
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ISSN:0003-6951
1077-3118
DOI:10.1063/5.0168167