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  • 1
    Electronic Resource
    Electronic Resource
    Resonance optical spectroscopy of long-period quantum-well structures (1997)
    Springer
    Physics of the solid state 39 (1997), S. 1852-1858 
    Details
    ISSN: 1063-7834
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Theory of specular light reflection from long-period quantum-well structures taking into account the exciton contribution to dielectric polarization has been developed for an arbitrary relation between the background refractive index in the well, n a, and barrier-material refractive index nb. General expressions for the optical reflection and transmission coefficients for a structure with N equidistant quantum wells are derived with the use of the Green’s function and transfer matrix methods. Normal and oblique light reflectance spectra from II-VI-based heterostructures were found to reveal a bright interference pattern caused by the difference between n a and n b. A comparison of the theory with experiment has yielded the dispersion of n a and n b within a broad wavelength range and the parameters of the quasi-two-dimensional heavyhole exciton (e1-hh1), namely, the resonant frequency and the radiative and nonradiative damping rates. Reflectance spectra from resonant Bragg and quasi-Bragg structures with real exciton parameters are calculated, and the effect on these spectra of the refractive-index difference and the deviation from the Bragg condition is analyzed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1130188
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  • 2
    Electronic Resource
    Electronic Resource
    Fine structure of excitonic levels in quantum dots (1997)
    Springer
    JETP letters 65 (1997), S. 804-809 
    Details
    ISSN: 1090-6487
    Keywords: 73.20.Dx ; 71.35.−y ; 33.15.Pw
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The experimental results of a study of the fine structure of the levels of excitons localized in InAlAs quantum dots in an AlGaAs matrix are reported. Transformations from optical orientation to alignment and from alignment to orientation, which occur due to the exchange splitting of a dipole-active excitonic doublet and are allowed by the low symmetry of a quantum dot, are observed in a longitudinal magnetic field (Faraday geometry). A comparison of theory with experiment for a self-organized ensemble of quantum dots enables a determination of the character of the distribution over the dipole orientations for resonance optical transitions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567429
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  • 3
    Electronic Resource
    Electronic Resource
    Optical orientation and alignment of excitons in quantum dots (1998)
    Springer
    Physics of the solid state 40 (1998), S. 790-793 
    Details
    ISSN: 1063-7834
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Optical orientation and alignment of excitons in InAlAs quantum dots in the AlGaAs matrix have been studied both theoretically and experimentally. Experiments performed in a longitudinal magnetic field (Faraday geometry) reveal transformation of optical orientation to alignment and alignment to orientation, which is caused by exchange splitting of the dipole-active exciton doublet and allowed by the quantum-dot low symmetry. A comparison of theory with experiment made with inclusion of the anisotropy of exciton generation and recombination along the $$[1\bar 10]$$ and [110] axes permits one to determine the character of dipole distribution in direction for resonant optical transitions in the self-organized quantum-dot ensemble studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1130397
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  • 4
    Electronic Resource
    Electronic Resource
    Interface optical anisotropy in a heterostructure with different cations and anions (1998)
    Springer
    Physics of the solid state 40 (1998), S. 1748-1753 
    Details
    ISSN: 1063-7834
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A theory of optical anisotropy and quantum-confined Pockels effect in CA/C′A′(001) quantum-well structures with different cations and anions, i.e. for C≠C′ and A≠A′, has been developed. The theory is based on a generalized effective-mass method, in which the boundary conditions for the envelope functions were constructed taking into account the mixing of heavy-and light-hole states under normal incidence of the hole on the interface. It is shown that an absorption anisotropy in interband transitions occurs for different mixing coefficients t l−h in the boundary conditions for the right-hand (A-C′) and left-hand (A′-C) interfaces. An analysis is made of the interface contribution to the anisotropy induced by an external electric field for coinciding and different band offsets at the interfaces. The microscopic sp 3 s* tight-binding model is used to estimate the difference between the t l−h(A-C′) and t l−h(A′-C) coefficients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1130649
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  • 5
    Electronic Resource
    Electronic Resource
    Exciton polaritons in quantum-dot photonic crystals (2000)
    Springer
    Physics of the solid state 42 (2000), S. 1756-1765 
    Details
    ISSN: 1063-7834
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present a theory of the photonic band structure of three-dimensional arrays of quantum dots (QDs). A system of Maxwell’s and material equations is solved and the dispersion equation for exciton-polaritons is derived making allowance for a nonlocal dielectric response of quasi-zero-dimensional excitons confined in QDs. The reflection and transmission coefficients are calculated for a single plane, a pair of planes and a stack of equidistant planes of QDs. Two different approaches are proposed to perform a calculation. One of them is based on recurrent equations relating the reflection coefficients for N + 1 and N planes, while in the other approach the Bloch solutions for an infinite QD lattice are used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1309465
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  • 6
    Electronic Resource
    Electronic Resource
    Dynamics of four-wave mixing on excitons in a quantum optical microcavity (1996)
    Springer
    JETP letters 64 (1996), S. 795-801 
    Details
    ISSN: 1090-6487
    Keywords: 42.65.Hw ; 42.55.Sq ; 71.35.Cc ; 78.66.Db
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A theory of degenerate four-wave mixing in a semiconductor optical cavity with quantum wells is constructed. The nonlinear response of a microcavity can be four to five orders of magnitude stronger than that of an isolated quantum well. For P 2 E-and P 3-type nonlinearities the damped diffracted signal oscillates with a period determined by the Rabi splitting. For a biexcitonic mechanism of nonlinearity, the signal contains damped overtones of the Rabi splitting and the biexciton binding energy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567250
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  • 7
    Electronic Resource
    Electronic Resource
    Resonant optical orientation and alignment of excitons in superlattices (1998)
    Springer
    Physics of the solid state 40 (1998), S. 2024-2030 
    Details
    ISSN: 1063-7834
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Exciton states in short-period GaAs/AlGaAs superlattices have been studied by optical orientation and optical dipole-moment alignment methods. The effect of magnetic field in the Faraday and Voigt geometries on the degree of linear and circular polarization of photoluminescence have been studied under resonant and nonresonant excitation. The constants of electron-hole exchange interaction in the exciton have been determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1130707
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  • 8
    Electronic Resource
    Electronic Resource
    The fine structure of excitonic levels in CdSe nanocrystals (2000)
    Springer
    Physics of the solid state 42 (2000), S. 2030-2038 
    Details
    ISSN: 1063-7834
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The fine structure of the exciton ground level in a spherical nanocrystal of a zincblende or a wurtzite structure semiconductor was calculated with the inclusion of short-and long-range (nonanalytical), exchange-interaction components. The band-parameter dependence of the long-range exchange-interaction contribution to the spin Hamiltonian describing the exciton ground-level splitting was found. A study was made of the effect exerted on the exciton-level fine structure by the difference between the background dielectric permittivities of the nanocrystal and of the dielectric host in which it was grown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1324036
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  • 9
    Electronic Resource
    Electronic Resource
    Electron g factor in quantum wires and quantum dots (1998)
    Springer
    JETP letters 67 (1998), S. 43-47 
    Details
    ISSN: 1090-6487
    Keywords: 73.61.Ey ; 71.70.Ej
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A theory of the Zeeman effect for electrons in one-and zero-dimensional semiconductor heterostructures is developed. A relation is established between the number of linearly independent components of the g-factor tensor and the point symmetry of a low-dimensional system. A specific calculation is performed for a spherical quantum dot and a cylindrical wire.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567625
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  • 10
    Electronic Resource
    Electronic Resource
    Fine structure of localized exciton levels in quantum wells (1998)
    Springer
    Journal of experimental and theoretical physics 86 (1998), S. 388-394 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A theory is constructed for the long-range exchange and retarding interactions between an electron and a hole in a quantum well. A method is developed that makes it possible to calculate the ground and excited states of an exciton localized as a whole on a width fluctuation of a quantum well in the form of a rectangular island. It is shown that taking into account the electron-hole interaction mechanisms considered here causes the radiation doublet of the exciton to split into two components polarized along the sides of the rectangle. The dependence of the magnitude and sign of this splitting on the linear dimensions of the island and the level number of the localized exciton are analyzed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.558441
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