Phonon confinement and plasmon-phonon interaction in nanowire-based quantum wells

Resonant Raman spectroscopy is realized on closely spaced nanowire-based quantum wells. Phonon quantization consistent with 2.4-nm-thick quantum wells is observed, in agreement with cross-section transmission electron microscopy measurements and photoluminescence experiments. The creation of a high-density plasma within the quantized structures is demonstrated by the observation of coupled plasmon-phonon modes. The density of the plasma and thereby the plasmon-phonon interaction is controlled with the excitation power. This work represents a base for further studies on confined high-density charge systems in nanowires.


Published in:
Physical Review B, 83, -
Year:
2011
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 Record created 2011-12-16, last modified 2018-03-17

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