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Semiconductor quantum tubes: Dielectric modulation and excitonic response

Authors: D. Kammerlander, F. Troiani, and G. Goldoni

Ref.: Phys. Rev. B 81, 115310 (2010)

Abstract: We study theoretically the optical properties of quantum tubes, one-dimensional semiconductor nanostructures where electrons and holes are confined to a cylindrical shell. In these structures, which bridge between two-dimensional and one-dimensional systems, the electron-hole interaction may be modulated by a dielectric substance outside the quantum tube and possibly inside its core. We use the exact Green’s function for the appropriate dielectric configuration and exact diagonalization of the electron-hole interaction within an effective-mass description to predict the evolution of the exciton binding energy and oscillator strength. Contrary to the homogeneous case, in dielectrically modulated tubes, the exciton binding is a function of the tube diameter and can be tuned to a large extent by structure design and proper choice of the dielectric media.

Citations: 8 (Google scholar)

DOI: 10.1103/PhysRevB.81.115310

URL: prb.aps.org

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Bibtex:

@article{Kammerlander_2010,
	doi = {10.1103/physrevb.81.115310},
	url = {https://doi.org/10.1103%2Fphysrevb.81.115310},
	year = 2010,
	month = {mar},
	publisher = {American Physical Society ({APS})},
	volume = {81},
	number = {11},
	author = {David Kammerlander and Filippo Troiani and Guido Goldoni},
	title = {Semiconductor quantum tubes: Dielectric modulation and excitonic response},
	journal = {Physical Review B}
}