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32 results on '"Skorikov, M. L."'

4. Role of Surface Treatments and Localized Surface Plasmon Nanoparticles on Internal Quantum Efficiency of 800 Nm Diameter Blue Gan/Ingan Nano Light Emitting Diodes

Author

Lee, In-Hwan, primary, Cho, Yeong-Hoon, additional, Alexanyan, L. A., additional, M.L. Skorikov, M. L., additional, Vasilev, A, additional, Romanov, A. A., additional, Matros, Nikolai, additional, Kochkova, A. I., additional, Polyakov, Alexander Y., additional, and Pearton, Stephen, additional

Published
2024
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5. Nonlinear emission dynamics of a GaAs microcavity with embedded quantum wells

Author

Belykh, V. V., Tsvetkov, V. A., Skorikov, M. L., and Sibeldin, N. N.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

The emission dynamics of a GaAs microcavity at different angles of observation with respect to the sample normal under conditions of nonresonant picosecond-pulse excitation is measured. At sufficiently high excitation densities, the decay time of the lower-polariton emission increases with the polariton wavevector; at low excitation densities the decay time is independent of the wavevector. The effect of additional nonresonant continuous illumination on the emission originating from the bottom of the lower polariton branch is investigated. The additional illumination leads to a substantial increase in the emission intensity (considerably larger than the intensity of the photoluminescence excited by this illumination alone). This fact is explained in terms of acceleration of the polariton relaxation to the radiative states due to scattering by charge carriers created by the additional illumination. The results obtained show, that at large negative detunings between the photon and exciton modes, polariton-polariton and polariton-free carrier scattering are the main processes responsible for the filling of states near the bottom of the lower polariton branch., Comment: 10 pages, 6 figures. This is an author-created, un-copyedited version of an article accepted for publication in Journal of Physics: Condesed Matter. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it

Published
2011
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24. Electronic spectrum of non-tetrahedral acceptors in CdTe:Cl and CdTe:Bi,Cl single crystals.

Author

Krivobok, V. S., Nikolaev, S. N., Bagaev, V. S., Pruchkina, A. A., Onishchenko, E. E., Kolosov, S. A., Klevkov, Yu. V., and Skorikov, M. L.

Subjects
ELECTRONIC spectra, CRYSTALS, PHOTOLUMINESCENCE, ELECTRONIC excitation, CADMIUM telluride
Abstract

The electronic spectra of complex acceptors in compensated CdTe:Cl, CdTe:Ag,Cl, and CdTe:Bi,Cl single crystals are studied using low-temperature photoluminescence(PL) measurements under both nonresonant and resonant excitation of distant donor-acceptor pairs (DAP). The wavelength modulation of the excitation source combined with the analysis of the differential PL signal is used to enhance narrow spectral features obscured because of inhomogeneous line broadening and/or excitation transfer for selectively excited DAPs. For the well-known tetrahedral (TD) AgCd acceptor, the energies of four excited states are measured, and the values obtained are shown to be in perfect agreement with the previous data. Moreover, splitting between the 2P3/2 (Г8) and 2S3/2 (Г8) states is clearly observed for AgCd centers located at a short distance (5-7 nm) from a hydrogen-like donor (ClTe). This splitting results from the reduction of the TD symmetry taking place when the acceptor is a member of a donor-acceptor pair. For the Cl-related complex acceptor with an activation energy of ~121 meV (A-center), the energies of eight excited states are measured. It is shown that this defect produces low-symmetry central-cell correction responsible for the strong splitting of S-like TD shells. The energy spectrum of the Bi-related shallow acceptor with an activation energy of ~36 meV is measured as well. The spectrum obtained differs drastically from the hydrogen-like set of levels, which indicates the existence of repulsive low-symmetry perturbation of the hydrogen-like Coulomb potential. It is also shown that the spectra of selectively excited PL recorded for a macroscopic ensemble of distant donor-acceptor pairs allow one to detect the low symmetry of acceptors of a given type caused by their complex nature or by the Jahn-Teller distortion. This method does not require any additional (external) field and is applicable to acceptors in diverse zinc-blende compound semiconductors. [ABSTRACT FROM AUTHOR]

Published
2016
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