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arXiv · 2403.16546

Unipolar opical transitons in nanoclusters of ellipsoidal geometry

G. Nikoghosyan·H. S. Nikoghosyan
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Abstract

The quantum states of an ellipsoidal nanocluster of a heterophase system InAs / GaAs are studied using an exact analytical approach, in contrast to the generally accepted theoretical model based on the adiabatic approximation. It is shown that the spectrum of a nanoobject is formed from local groups, consisting of discrete levels, separated by terahertz frequency intervals. A double random degeneration of certain spectrum states is revealed. Allowed mid-infrared (IR) optical transitions between different spectral states are analyzed. The role of dimensional parameters and features of the shape of a nanoobject in the characteristics of unipolar transitions is assessed. The absorption spectrum for the transition in the lower part of the substructure spectrum is calculated.

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G. Nikoghosyan, H. S. Nikoghosyan. 2024-03-25. Unipolar opical transitons in nanoclusters of ellipsoidal geometry. https://doi.org/10.1016/j.physb.2024.415921

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