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Magnetooptical Studies of CdTe-Rich Epitaxial Layers

100%
Dudziak E., Bożym J., Pruchnik D., Jędral L.
Acta Physica Polonica A
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1991
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vol. 80
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issue 3
325-328
EN
The first magnetooptical studies comprising magnetoreflection, magnetoabsorption and Faraday rotation of CdTe-rich Hg_{1-x-y}Cd_{x}Mn_{y}Te are reported. The drastic disappearing of excitonic structure, for already very small Hg content, has been observed. The exchange parameters close to those for CdMnTe have been found.
2
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Large Filling-Factor-Dependent Spin Splitting in Magnetooptic Kerr Effect in GaAs/AlGaAs Multiple Quantum Wells

100%
Dudziak E., Bozym J., Pruchnik D., Wasilewski Z.
Acta Physica Polonica A
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1998
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vol. 94
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issue 2
291-296
EN
Magnetooptic Kerr effect in GaAs/Al_{0.312}Ga_{0.688}As multiple quantum wells was investigated in the integer quantum Hall regime. The measurements have been performed in magnetic fields up to 14.5 T, at the temperature of 1.8 K. Experimental data indicate the discontinuous behavior of the magnetooptic Kerr effect spectrum as a function of the filling factor. For odd filling factor values ν=3 and 5 we observe the large spin splitting. The effects cannot be explained in the one-particle model.
3
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Faraday Rotation in Multiple Quantum Wells of GaAs/AlGaAs

100%
Dudziak E., Bożym J., Pruchnik D., Wasilewski Z.
Acta Physica Polonica A
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1996
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vol. 90
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issue 5
1022-1026
EN
We report on the results of first measurements of the Faraday rotation of modulated n-doped multiple quantum wells of GaAs/Al_{x}Ga_{1-x}As (x = 0.312). The measurements have been performed in the magnetic fields up to 13 T at the temperature of 2 K, in the spectral region of interband transitions. A rich structure of magneto-excitons has been found in the measured spectra. Faraday rotation (phase) measurements are proposed as an alternative method to photoluminescence excitation for investigations of magneto-excitons in quantum wells. The dependence of the measured Faraday rotation on magnetic field and hypothetical connections with quantum Hall effect are also discussed.
4
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Investigation of Phonons in HgCdMnTe Using Far-Infrared Reflectivity

100%
Dudziak E., Bożym J., Pruchnik D., Baran J.
Acta Physica Polonica A
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1993
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vol. 84
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issue 3
595-598
EN
The first reflectivity spectra of Hg_{1-x-y}Cd_{x}Mn_{y}Te with 0.03 < x < 0.1 and 0 < y < 0.05 were measured in the spectral region 700-30 cm^{-1} at 300 K and 90 K. The quaternary alloys measured show three mode behaviour. The experimental results are interpreted by using a classical dynamic dielectric function model.
5
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Magnetooptical Studies of Quasi-Two-Dimensional Electron Layer on HgCdMnTe

100%
Dudziak E., Bożym J., Pruchnik D.
Acta Physica Polonica A
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1995
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vol. 87
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issue 2
563-566
EN
Photovoltaic magneto-spectroscopy was used for the first time as the interband probe in the study of the 2D electron gas on narrow-gap HgCdMnTe semiconductor. The strong circular dichroism was found which agrees with the phenomenological description of the optical properties of the 2D electron systems in quantized Hall regime. The model of coupled inter­subband resonances and interband transitions was proposed as a qualitative explanation.
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