Proceedings of nanoGe Fall Meeting 2021 (NFM21)
DOI: https://doi.org/10.29363/nanoge.nfm.2021.176
Publication date: 23rd September 2021
We investigate the charge carrier mobility in 1D and 2D II-VI semiconductor nanoparticles. Based on a quantum mechanical modeling of CdSe Nanorods and -platelets, we provide a microscopic understanding of the frequency-dependent charge carrier transport in structures of finite lateral size. In contrast to Drude-type terahertz conductivity models, which imply a quasi-continuous density of states, the domain size of 1D or 2D nanoparticles strongly affects the frequency-dependent mobility and strong confinement can further result in oscillations for sub-resonant THz-probing, as seen in experiments. In 2D systems the mobility is further governed by transitions in the two orthogonal x-
and y-directions and depends nontrivially on the THz polarization, as well as the quantum well lateral aspect ratio, defining the energetic detuning of the lowest THz-photon transitions in both directions.
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