Influence of Magnetic Field on Blue Anti-Stokes Luminescence of ZnSe:Cr Crystals

• Authors: V. Ivanov , Yu.G. Semenov , M. Surma , M. Godlewski
• Languages of publication: EN

Abstracts

EN

The results of photoluminescence and magneto-luminescence studies of chromium doped ZnSe crystals are presented for blue colour shallow donor-shallow acceptor pair photoluminescence, with a zero phonon line at 2.692 eV. This donor-acceptor pair photoluminescence is observed under photo-excitation with photon energies smaller than the emission energy (anti-Stokes luminescence) and dominates in the photoluminescence spectrum of ZnSe:Cr at the excitation energy about 2.41 eV and for temperature T<20 K. A quantum efficiency of this anti-Stokes luminescence is relatively large. It is of about 10^{-3} at 0 T and increases with increasing magnetic field up to 7 T at temperature T=2 K. We relate the intensity of the anti-Stokes luminescence to a non-equilibrium concentration of photo-excited Cr^{+} ions and propose that the rate of spin-dependent recombination of Cr^{+} ions with free holes (decreases with increasing magnetic field) is responsible for the observed increase in the anti-Stokes luminescence intensity at higher magnetic fields.

Keywords

EN

71.55.Gs; 78.55.Et; 76.30.Fc

Discipline

• 76.30.Fc: Iron group (3d) ions and impurities (Ti-Cu)
• 78.55.Et: II-VI semiconductors
• 71.55.Gs: II-VI semiconductors

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1996
• Volume: 90
• Issue: 4
• Pages: 821-824

Dates

published

1996-10

Contributors

author

V. Ivanov

• Department of Physics, University of Dnepropetrovsk, 320625, Dnepropetrovsk, Ukraine

author

Yu.G. Semenov

• Institute of Semiconductors Physics, National Acad. of Science, 252650, Kiev, Ukraine

author

M. Surma

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 42/36, 02-668 Warsaw, Poland

author

M. Godlewski

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 42/36, 02-668 Warsaw, Poland

Identifiers

DOI

10.12693/APhysPolA.90.821