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Coupling of Quantum Dots with Quantum Wells in a System Based on (Cd,Zn,Mg)Te

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Połczyńska K., Janik E., Kossacki P., Pacuski W.
Acta Physica Polonica A
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2017
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vol. 132
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issue 2
369-371
EN
Coupled low dimensional structures have potential applications in quantum computing and spintronics. Using molecular beam epitaxy we fabricated three kinds of systems of coupled quantum wells and quantum dots with different energy order: wells at higher energy than dots, resonant structures, and dots at higher energy than wells. By analysis of photoluminescence and reflectivity spectra, we conclude that there is a possibility of effective carrier tunneling between structures, which opens possibility of subsequent testing of spin transfer efficiency.
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Optical absorption and reflectivity spectra of highly chromium doped CdTe alloy and layer

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Potera P., Stefaniuk I., Kuzma M., Virt I., Pukowska B.
Open Physics
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2009
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vol. 7
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issue 2
299-303
EN
In the present work, a CdTe alloy doped with a relatively high concentration of chromium (1%), and a CdTe:Cr layer, have been studied. Absorption and reflectivity spectra were measured at room temperature. They indicate the presence of chromium in the divalent state, both in the alloy and in the layer.
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