Excited States in Semiconductors

Klingshirn, C.

doi:10.1007/978-1-4615-3044-2_4

Cited by 10 publications

(1 citation statement)

References 132 publications

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“…Moreover, the maximum of the PL band shifts to the low-energy side. The broadening and redshift of the 2LO phonon-assisted band is a typical characteristic of the formation of an electron-hole plasma (EHP), which comes from the interaction between carriers [25].…”

Section: Resultsmentioning

confidence: 99%

Phonon-assisted stimulated emission in Mn-doped ZnO nanowires

Liu

Pan

Fan³

et al. 2007

J. Phys.: Condens. Matter

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Well-crystallized Mn-doped ZnO nanowires were synthesized by a hightemperature chemical reduction method. The microscopic and macroscopic photoluminescence (PL) spectra of these Mn-doped ZnO nanowires were studied. Both the free-exciton emission band and the second-order longitude optical (2LO) phonon-assisted emission band were observed in the microscopic PL spectra. Furthermore, from the power dependent macroscopic PL spectra, the stimulated emission was observed around the 2LO phonon-assisted emission band with an increase in pump fluence, which relates to the strong excitonphonon couplings along the c-axis in these Mn-doped ZnO nanowires. The nonresonant micro-Raman scattering spectrum demonstrates the strong 2LO phonon mode, which is enhanced by Mn doping. Resonant micro-Raman scattering shows multi-LO modes, due to the strong exciton-phonon coupling via a deformation potential induced by the Mn ions in these Mn-doped ZnO nanowires. Moreover, the low-temperature UV PL band is discussed to demonstrate the activity of phonons in the Mn-doped ZnO nanowires.

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Section: Resultsmentioning

confidence: 99%