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

TL;DR

This study investigates phonon confinement and plasmon-phonon interactions in nanowire quantum wells using resonant Raman spectroscopy, revealing quantized phonons and controllable plasmon-phonon coupling in high-density charge systems.

Contribution

It demonstrates phonon quantization and plasmon-phonon interactions in nanowire quantum wells, with control over plasma density via excitation power, advancing understanding of confined charge systems.

Findings

Phonon quantization consistent with 2.4 nm quantum wells.

Observation of coupled plasmon-phonon modes.

Plasma density controlled by excitation power.

Abstract

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.