Prolate spheroidal quantum dot: Electronic states, direct interband light absorption and electron dipole moment

2015 ◽  
Vol 479 ◽  
pp. 85-89 ◽  
Author(s):  
D.A. Baghdasaryan ◽  
D.B. Hayrapetyan ◽  
E.M. Kazaryan
Keyword(s):  
Dipole Moment ◽  
Quantum Dot ◽  
Light Absorption ◽  
Electronic States ◽  
Prolate Spheroidal ◽  
Interband Light Absorption

scholarly journals Оптические свойства соединений YFe-=SUB=-2-=/SUB=- и TbFe-=SUB=-2-=/SUB=-

2020 ◽  
Vol 62 (7) ◽  
pp. 1004
Author(s):  
Ю.В. Князев ◽  
Ю.И. Кузьмин
Keyword(s):  
Optical Properties ◽  
Spectral Characteristic ◽  
Wavelength Range ◽  
Optical Conductivity ◽  
Light Absorption ◽  
Electronic States ◽  
Electron Transitions ◽  
Quantum Electron ◽  
Interband Light Absorption ◽  
Conductivity Spectra

Ellipsometric investigation of the optical properties of YFe2 and TbFe2 intermetalic compounds have been carried out in wavelength range of 0.22 –15 μm. A number of electronic and spectral characteristic was determined. Nature of interband light absorption in these materials is discussed on base of comparative analyses of experimental and theoretical optical conductivity spectra. Experimental optical conductivities of the compounds are shown to conform qualitatively to spectra calculated from densities of electronic states in the region of quantum electron transitions.

Conical quantum dot: Electronic states and dipole moment

2017 ◽  
Vol 52 (2) ◽  
pp. 129-137 ◽  
Author(s):  
D. A. Baghdasaryan ◽  
D. B. Hayrapetyan ◽  
H. A. Sarkisyan ◽  
E. M. Kazaryan ◽  
A. Medvids
Keyword(s):  
Dipole Moment ◽  
Quantum Dot ◽  
Electronic States

scholarly journals Coefficient of Interband Light Absorption by InAs/GaхIn1-хAs Quantum Dot Superlattice at Low Temperatures

2017 ◽  
Vol 18 (2) ◽  
pp. 151-157
Author(s):  
V.I. Boichuk ◽  
I.V. Bilynsky ◽  
R.I. Pazyuk
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Absorption Coefficient ◽  
Light Absorption ◽  
Low Temperatures ◽  
Dispersion Relations ◽  
Interband Absorption ◽  
Absorption Bands ◽  
Interband Light Absorption

In the paper the InAs/GaxIn1-xAs superlattice system of small size cubic QDs (10 nm) has been considered. Dispersion relations for electron and hole subbands have been calculated for superlattices of different dimensionality. The dependences of the interband absorption coefficient on light frequency, quantum dot size and interdot distance have been researched.It is shown, that the dimension of the superlattice has influence on the shape of the absorption bands and the increasingof the distance between quantum dots is followed by narrowing of the absorption peaks for all three superlatticetypes.

scholarly journals Direct Interband Light Absorption in Conical Quantum Dot

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
D. B. Hayrapetyan ◽  
A. V. Chalyan ◽  
E. M. Kazaryan ◽  
H. A. Sarkisyan
Keyword(s):  
Quantum Dot ◽  
Quantum Number ◽  
Light Absorption ◽  
Principal Quantum Number ◽  
Particle Energy ◽  
Geometrical Parameters ◽  
Quantum Numbers ◽  
Direct Light ◽  
Interband Light Absorption ◽  
Analytical Expressions

In the framework of the adiabatic approximation, the energy states of electron as well as the direct light absorption are investigated in conical quantum dot. Analytical expressions for particle energy spectrum are obtained. The dependence of the absorption edge on geometrical parameters of conical quantum dot is obtained. Selection rules are revealed for transitions between levels with different quantum numbers. In particular, it is shown that for the radial quantum number transitions are allowed between the levels with the same quantum numbers, and any transitions between different levels are allowed for the principal quantum number.

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

2008 ◽  
Vol 4 (2) ◽  
pp. 130-137 ◽  
Author(s):  
Karen G. Dvoyan ◽  
David B. Hayrapetyan ◽  
Eduard M. Kazaryan ◽  
Ani A. Tshantshapanyan
Keyword(s):  
Quantum Dot ◽  
Cross Section ◽  
Light Absorption ◽  
Electronic States
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