Size effects on magneto-optics in spherical quantum dots

The magneto-optical absorption in ‘spherical’ quantum dots ‘completely’ confined by a harmonic potential and exposed to an applied magnetic field in the symmetric gauge is investigated. This is done within the framework of Bohm–Pines’ random phase approximation (RPA) that enables us to derive and di...

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Bibliographic Details
Published in:Electronics letters 2014-08, Vol.50 (18), p.1305-1307
Main Author: Kushwaha, M.S
Format: Article
Language:English
Subjects:
applied magnetic field
Approximation
blue‐shift
Bohm–Pines RPA
Confinement
Coulomb friction
Coulomb interactions
Cross-disciplinary physics: materials science
rheology
Dyson equation
Exact sciences and technology
harmonic potential
intraLandau level transitions
Landau levels
magnetic field
Magnetic fields
Magneto-optics
magnetoabsorption
magnetooptic property
magnetooptical absorption
Materials science
Mathematical analysis
Nanoscale materials and structures: fabrication and characterization
Photonics
Physics
Quantum dots
Radial distribution
RPA calculations
size effect
size effects
spectral line shift
spherical quantum dots
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Summary:The magneto-optical absorption in ‘spherical’ quantum dots ‘completely’ confined by a harmonic potential and exposed to an applied magnetic field in the symmetric gauge is investigated. This is done within the framework of Bohm–Pines’ random phase approximation (RPA) that enables us to derive and discuss the full Dyson equation that takes proper account of the Coulomb interactions. Intensifying the confinement or magnetic field and reducing the dot-size yields a blue-shift in the absorption peaks. However, the size effects are seen to be predominant in this role. The magnetic field tends to maximise the localisation of the particle, but leaves the peak position of the radial distribution intact. The intra-Landau level transitions are forbidden.
ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2014.2060