Work

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

Year: 2008

Type: article

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 spectrum of the particle is obtained. For the one-dimensional "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 Pöschl-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.

Source: Nanoscale Research Letters

DOI: 10.1007/s11671-008-9212-7

Authors: Karen G Dvoyan, David B Hayrapetyan, Eduard M Kazaryan, Ani A Tshantshapanyan

Institutions: Russian-Armenian University, National Polytechnic University of Armenia

Language: English

Topic: Semiconductor Quantum Structures and Devices

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,790

Funder: Armenian National Science and Education Fund