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Excitonic quasimolecule consisting of two semiconductor quantum dots

Pokutnyi S.I., Salejda W.

Optica Applicata

2016

Vol. 46, nr 4

629--637

The effect of a significant increase in the binding energy of the singlet ground state of an excitonic quasimolecule consisting of two CdS quantum dots, in comparison with the binding energy of a biexciton in a single crystal of CdS (almost by two orders of magnitude), has been found.

Nanolaser on heavy hole transition in semiconductor nanocrystals

Pokutnyi S.I., Salejda W., Jacak L., Misiewicz J., Tyc M.

Optica Applicata

2002

Vol. 32, nr 1-2

147-156

We discuss energy spectrum of electron-hole pairs in a quasi-zero-dimensional system consisting of spherical semiconductor nanocrystals placed in transparent dielectric matrices. Absorption and emission of light in such systems is investigated. We study theoretically the prospect of using hole transitions between equidistant series of quantum levels observed in nanocrystals in design of a nanolaser

Giant absorption of light in quasi-zero-dimensional structures

Pokutnyi S.I., Salejda W., Jacak L., Misiewicz J., Tyc M.

Optica Applicata

2001

Vol. 31, nr 3

659-671

We present a theory of electromagnetic field interaction with one-particle localized charged states emerging near the small spherical semiconductor or dielectric particles of radius a placed in dielectric matrices. In the framework of the dipole approximation we predict theoretically giant magnitudes of: 1) transitions oscillator strengths, and 2) the resonance light absorption cross-section sigma /sub aba/( omega , a). We suggest that these peculiarities can be observed experimentally in the systems under consideration. We also discuss the dependence of sigma /sub abs/ ( omega ,a) and the scattering cross-section sigma /sub abs/( omega ,a) on light frequency and radius a of one-particle localized excitations under different physical circumstances.