Dielectric enhancement of the exciton energies in laser-dressed near-surface quantum wells

We have applied the 45° reflectometry for the first time to study exciton-polaritons in quantum wells. The 45° reflectometry is a new polarization-modulation technique, which is based on the measurement of the difference [Formula: see text] between the p-polarization reflectivity (Rp) and the squared s-polarization reflectivity [Formula: see text] at an angle of incidence of 45°. We show that [Formula: see text] spectra may provide qualitatively new information on the exciton-polariton modes in a quantum well. These optical spectra turn out to be very sensitive to the zeros of the dielectric function along the quantum-well growth direction and, therefore, allow to identify the resonances associated with the Z exciton-polariton mode. We demonstrate that 45° reflectometry could be a powerful tool for studying Z exciton-polariton modes in near-surface quantum wells, which are difficult to observe in simple spectra of reflectivity Rp

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Intense laser field effect on the interband absorption in differently shaped near-surface quantum wells

Physics Letters A ◽

10.1016/j.physleta.2010.12.077 ◽

2011 ◽

Vol 375 (6) ◽

pp. 1036-1042 ◽

Cited By ~ 15

Author(s):

Nicoleta Eseanu

Keyword(s):

Quantum Wells ◽

Laser Field ◽

Field Effect ◽

Intense Laser ◽

Interband Absorption ◽

Intense Laser Field ◽

Near Surface

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Interband absorption in square and semiparabolic near-surface quantum wells under intense laser field

The European Physical Journal B ◽

10.1140/epjb/e2010-10556-3 ◽

2011 ◽

Vol 79 (3) ◽

pp. 313-319 ◽

Cited By ~ 26

Author(s):

E. C. Niculescu ◽

N. Eseanu

Keyword(s):

Quantum Wells ◽

Laser Field ◽

Intense Laser ◽

Interband Absorption ◽

Intense Laser Field ◽

Near Surface

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Simulation of Structural Transformations in Modified Near-Surface Layers of Crystals

Materials Science Forum ◽

10.4028/www.scientific.net/msf.970.276 ◽

2019 ◽

Vol 970 ◽

pp. 276-282

Author(s):

Yury Borodin ◽

Anastasia Mantina

Keyword(s):

Quantum Wells ◽

Riemannian Space ◽

Structural Transformations ◽

Thin Layers ◽

Surface Layers ◽

Near Surface ◽

Internal Geometry ◽

Structure Ordering

Superlattice formation in thin layers of oxidizing crystals and the effect of near-surface proton saturation on structure ordering, formation and periodical distribution of quantum wells have been discussed. The paper shows, it is necessary to develop non-Euclidean approach to the crystal’s internal geometry and consider, in consecutive order, the question of the four-dimentional Riemannian space into three-dimentional Eucliden space interpretation (RE interpretation).

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