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Electronic States and Light Absorption in a Cylindrical Quantum Dot Having Thin Falciform Cross Section

Dvoyan, Karen and Hayrapetyan , David and Kazaryan , Eduard and Tshantshapanyan, Ani (2009) Electronic States and Light Absorption in a Cylindrical Quantum Dot Having Thin Falciform Cross Section. Nanoscale Research Letters, Volume 4 (Number 2). pp. 130-137. ISSN 1931-7573 (Print) 1556-276X (Online)

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Abstract

Energy level structure and direct light absorption in a cylindrical quantum dot (CQD), having thin falciform cross section, are studied within the framework of the adiabatic approximation. An analytical expression for the energy spectrumof the particle is obtained. For the one-imensional ‘‘fast’’ subsystem, an oscillatory dependence of the wave function amplitude on the cross section parameters is revealed. For treatment of the ‘‘slow’’ subsystem, parabolic and modified Po¨schl-Teller effective potentials are used. It is shown that the low-energy levels of the spectrum are equidistant. In the strong quantization regime, the absorption coefficient and edge frequencies are calculated. Selection rules for the corresponding quantum transitions are obtained.

Item Type:Article
Uncontrolled Keywords:Cylindrical quantum dot, Falciform cross section, Modified Poschl-Teller potential, Light absorption, Selection rules
Subjects:Physical Science > Nanophysics
Physical Science > Nanoelectronics
Physical Science > Quantum phenomena
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
ID Code:4191
Deposited By:Mrs Ani Tshantshapanyan
Deposited On:11 Aug 2009 07:22
Last Modified:11 Aug 2009 07:22

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