arXiv subjects

V. G. Fedoseyev

Publications and source records attributed to V. G. Fedoseyev.

4 recordsLinked to original sources

arXiv2011

Influence of photoexcitation depth on luminescence spectra of bulk GaAs single crystals: application to defect structure characterization

The results of investigation of bulk GaAs photoluminescence are presented taken from near-surface layers of different thicknesses using for excitation the light with the wavelengths which are close but some greater than the excitonic absorption resonances (so-called "bulk" photoexcitation). Only the excitonic and band-edge luminescence is seen under the interband excitation, while under the "bulk" excitation, the spectra are much more informative. The interband excited spectra of all the samples investigated in the present work are practically identical, whereas the bulk excited PL spectra are different for different samples and excitation depths and provide the information on the deep-level point defect composition of the bulk materials.

cond-mat.mtrl-sci↗

arXiv2011

Influence of Photoexcitation Depth on Luminescence Spectra of Bulk GaAs Single Crystals and Defect Structure Characterization

The results of investigation of bulk GaAs photoluminescence are presented taken from near-surface layers of different thicknesses using for excitation the light with the wavelengths which are close but some greater than the excitonic absorption resonances (so-called bulk photoexcitation). Only the excitonic and band-edge luminescence is seen under the interband excitation, while under the bulk excitation, the spectra are much more informative. The interband excited spectra of all the samples investigated in the present work are practically identical, whereas the bulk excited PL spectra are different for different samples and excitation depths and provide the information on the deep-level point defect composition of the bulk materials.

cond-mat.mtrl-sci↗

arXiv2008

Conservation laws and angular transverse shifts of the reflected and transmitted light beams

The relation between the angular transverse shifts of the beams reflected and transmitted at a plane interface of two isotropic transparent media is established. The derivation of this relation is based on the conservation law of the transverse component of the Minkowski linear momentum, which takes place in the processes of the reflection and transmission of wave packets.

physics.optics↗

arXiv2007

2D shift of the centre of gravity of the light beam carrying orbital angular momentum, which accompanies reflection from a lossy medium

It is shown that after reflection from a lossy medium the $s$- or $p$-polarized paraxial light beam carrying the orbital angular momentum suffers the 2D shift of the beam's centre of gravity relative the geometric optic axis. The mutually orthogonal components of this shift are expressed through the real and imaginary parts of the common complex quantity. The features of the 2D vector, which describes the shift, are analyzed.

physics.optics↗