scholarly journals Light absorption in semiconducting quantum dot clusters with fixed surface areas in an external tilted magnetic field

AIP Advances ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 085306
Author(s):  
M. Solaimani ◽  
Davood Haji Taghi Tehrani
Keyword(s):  
Magnetic Field ◽  
Quantum Dot ◽  
Light Absorption ◽  
Surface Areas ◽  
Tilted Magnetic Field

Dark excitons in a quantum-dot–cavity system under a tilted magnetic field

2017 ◽  
Vol 96 (12) ◽  
Author(s):  
C. A. Jiménez-Orjuela ◽  
H. Vinck-Posada ◽  
José M. Villas-Bôas
Keyword(s):  
Magnetic Field ◽  
Quantum Dot ◽  
Cavity System ◽  
Tilted Magnetic Field

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.

scholarly journals Optical Stark shift to control the dark exciton occupation of a quantum dot in a tilted magnetic field

2021 ◽  
Vol 104 (7) ◽  
Author(s):  
Miriam Neumann ◽  
Florian Kappe ◽  
Thomas K. Bracht ◽  
Michael Cosacchi ◽  
Tim Seidelmann ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dot ◽  
Stark Shift ◽  
Dark Exciton ◽  
Tilted Magnetic Field

MAGNETIC FIELD, PRESSURE AND TEMPERATURE DEPENDENT OPTICAL PROPERTIES IN A GaAs 9.0 P 1.0 QUANTUM DOT

2014 ◽  
Vol 6 (2) ◽  
pp. 1178-1190
Author(s):  
A. JOHN PETER ◽  
Ada Vinolin
Keyword(s):  
Magnetic Field ◽  
Optical Properties ◽  
Quantum Dot ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Photon Energy ◽  
Nonlinear Optical ◽  
Binding Energies ◽  
Nonlinear Optical Properties ◽  
Optical Rectification

Simultaneous effects of magnetic field, pressure and temperature on the exciton binding energies are found in a 9.0 1.0 6.0 4.0 GaAs P / GaAs P quantum dot. Numerical calculations are carried out taking into consideration of spatial confinement effect. The cylindrical system is taken in the present problem with the strain effects. The electronic properties and the optical properties are found with the combined effects of magnetic field strength, hydrostatic pressure and temperature values. The exciton binding energies and the nonlinear optical properties are carried out taking into consideration of geometrical confinement and the external perturbations.Compact density approach is employed to obtain the nonlinear optical properties. The optical rectification coefficient is obtained with the photon energy in the presence of pressure, temperature and external magnetic field strength. Pressure and temperature dependence on nonlinear optical susceptibilities of generation of second and third order harmonics as a function of incident photon energy are brought out in the influence of magnetic field strength. The result shows that the electronic and nonlinear optical properties are significantly modified by the applications of external perturbations in a 9.0 1.0 6.0 4.0 GaAs P / GaAs P quantum dot.

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