Exact Numerical Procedure for the Binding Energy of Hydrogen Impurities in Quantum Dots with Parabolic Confinements

2013 ◽  
Vol 475-476 ◽  
pp. 1355-1358
Author(s):  
Arnold Abramov
Keyword(s):  
Quantum Dots ◽  
Wave Function ◽  
Binding Energy ◽  
Quantum Dot ◽  
Excited States ◽  
Ground State ◽  
Qualitative Agreement ◽  
Numerical Procedure ◽  
Impurity States ◽  
Parabolic Confinement

In this paper we present exact numerical procedure to calculate the binding energy and wave function of impurity states in a quantum dot with parabolic confinement. The developed method allows control the accuracy of obtained results, as well as calculates the characteristics of not only ground state, but also of the excited states. Comparison of our results with data obtained by other methods is in quantitative and qualitative agreement. We studied the effects of impurity position on the binding energy.

IMPURITY LEVELS IN A PARABOLIC QUANTUM DOT UNDER ACTION OF A STRONG MAGNETIC FIELD

2001 ◽  
Vol 15 (31) ◽  
pp. 4103-4110 ◽  
Author(s):  
E. M. KAZARYAN ◽  
L. S. PETROSYAN ◽  
H. A. SARKISYAN
Keyword(s):  
Magnetic Field ◽  
Energy Level ◽  
Quantum Dot ◽  
Excited States ◽  
Adiabatic Approximation ◽  
Impurity States ◽  
Parabolic Confinement ◽  
Analytical Expressions ◽  
Ground Energy ◽  
Parabolic Quantum Dot

The impurity states in quantum dot with parabolic confinement were studied in adiabatic approximation. The analytical expressions for the energy of ground and excited states were obtained. It was shown, that the influence of walls results in raising the ground energy level.

scholarly journals Investigation of Light Absorption in a ZnS Quantum Dot

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Hojjatollah K. Salehani ◽  
Maedeh Zakeri
Keyword(s):  
Magnetic Field ◽  
Optical Absorption ◽  
Quantum Dot ◽  
Excited States ◽  
Light Absorption ◽  
Blue Shift ◽  
Optical Absorption Coefficient ◽  
Parabolic Confinement ◽  
Parabolic Confinement Potential ◽  
The Magnetic Field

The light absorption of a ZnS quantum dot with a parabolic confinement potential is studied in this paper in the presence of magnetic field perpendicular to dot plane. The Schrodinger equation of a single electron is solved numerically, and energy spectra and wave functions are obtained. Then, the optical absorption coefficients in transition from ground state to different excited states are calculated. The effects the magnetic field and quantum dot width on the optical absorption are investigated. It is found that the optical absorption coefficient has a blue shift by increasing of magnetic field or confinement strength of quantum dot.

STABILITY OF AN EXCITON BOUND TO AN IONIZED ACCEPTOR IN QUANTUM DOTS

2003 ◽  
Vol 17 (11) ◽  
pp. 2273-2279 ◽  
Author(s):  
S. BASKOUTAS ◽  
A. F. TERZIS ◽  
C. POLITIS
Keyword(s):  
Quantum Dots ◽  
Binding Energy ◽  
Quantum Dot ◽  
Numerical Method ◽  
Schrodinger Equation ◽  
Critical Radius ◽  
Critical Value ◽  
Two Dimensional ◽  
Mass Ratio ◽  
Acceptor Impurity

Binding energy for an exciton (X) bound in a parabolic two-dimensional quantum dot by an acceptor impurity A- located on the z-axis at a distance d from the dot plane, are calculated using the Hartree formalism with a recently developed numerical method (PMM) for the solution of the Schrödinger equation. As our analysis indicates there is a critical dot radius Rc such that for R < Rc the complex (A-, X) is unstable and with an increase of the impurity distance this critical radius increases. Furthermore, there is a critical value σc of the mass ratio [Formula: see text] such that for σ > σc the complex is stable.

DESCRIPTION OF 8Be AS DEFORMED GAS-LIKE TWO-ALPHA-PARTICLE STATES

2003 ◽  
Vol 18 (02n06) ◽  
pp. 170-173
Author(s):  
Y. FUNAKI ◽  
H. HORIUCHI ◽  
A. TOHSAKI ◽  
P. SCHUCK ◽  
G. RÖPKE
Keyword(s):  
Wave Function ◽  
Excited States ◽  
Ground State ◽  
Cluster Structure ◽  
Test Case ◽  
Weakly Bound ◽  
Generator Coordinate Method ◽  
Spatial Deformation ◽  
Generator Coordinate ◽  
Spin Excitations

In order to study non-zero spin excitations of the recently proposed α-cluster condensation in the self-conjugate 4n nuclei, spatial deformation is introduced into the model wave function of the α-cluster condensate. The rotational band states of 8 Be are investigated as a first step of a test case for the study of the deformation of the α-cluster condensate. Calculations reproduce well the binding energy of the 0+ ground state and also the excitation energy of the 2+ state. Our 0+ wave function is found to be exactly equal to the 0+ wave function obtained by the generator coordinate method using Brink's 2α wave function. The study shows that both the 0+ ground and 2+ excited states can be considered as having a gas-like (i.e. weakly bound) 2α-cluster structure.

scholarly journals Effect of excited states on the ground-state modulation bandwidth in quantum dot lasers

2013 ◽  
Vol 102 (19) ◽  
pp. 191102 ◽  
Author(s):  
Yuchang Wu ◽  
Robert A. Suris ◽  
Levon V. Asryan
Keyword(s):  
Quantum Dot ◽  
Excited States ◽  
Ground State ◽  
Quantum Dot Lasers ◽  
Modulation Bandwidth

scholarly journals Simple and Multi-layered Quantum dot in various structures

2018 ◽  
Vol 2 (4) ◽  
Author(s):  
Manu Mitra
Keyword(s):  
Quantum Dots ◽  
Wave Function ◽  
Optical Properties ◽  
Quantum Dot ◽  
Three Dimensional ◽  
Polarized Light ◽  
High Peak ◽  
Different Color ◽  
Incoming Light ◽  
Dimensional Wave

Abstract: Quantum dots have interesting optical properties. They absorb incoming light of one color and emit out light of a completely different color. This research paper discloses eigen states of a simple and multilayer quantum dot in various structures for cuboid, cylinder, dome, cone, and pyramid, and its three-dimensional wave function, energy states, light and dark transitions (X-polarized), light and dark transitions (Y-polarized), light and dark transitions (Zpolarized), light and dark transitions (phi = 0 and theta= 45), absorption (phi = 0 and theta = 45), absorption sweep of angle theta, and integrated absorption are plotted and the observations of high peak values are noted and documented.

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