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1
Content available Excitonic quasimolecule consisting of two semiconductor quantum dots
Pokutnyi S.I., Salejda W.
Optica Applicata
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2016
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Vol. 46, nr 4
629--637
EN
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.
2
Content available remote Reverse engineering of AlxGa₁₋xAs/GaAs structures composition by reflectance spectroscopy
Wośko M., Paszkiewicz B., Tarnowski K., Ściana B., Radziewicz D., Salejda W., Paszkiewicz R., Tłaczała M.
Opto-Electronics Review
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2011
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Vol. 19, No. 4
418-424
EN
The paper presents the application of non-modulation reflectance method for composition profiling of epitaxial AlxGa₁₋xAs/GaAs structures. This non-destructive method is based on spectral measurements and theoretical reflectance spectrum matching. This is a very accurate and sensitive method of determining the Al composition in AlxGa₁₋xAs layers and structures with resolution down to 1 nm. In this work, the authors describe theoretic principles of this method and present experimental results of characterization of different AlGaAs structures to prove the potential of the worked out method.
3
Content available remote Mechanika kwantowa. Formalizm i zastosowania [rec.]
Salejda W.
Postępy Fizyki
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2007
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T. 58, z. 4
180-181
PL
Recenzja książki: Leszek Adamowicz - Mechanika kwantowa. Formalizm i zastosowania, Oficyna Wydawnicza Politechniki Warszawskiej, Warszawa 2005, s. 272.
4
Content available remote Propagation of polarized light through optical nanosuperlattices
Tarnowski K., Salejda W., Tyc M.H.
Optica Applicata
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2007
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Vol. 37, nr 4
387-396
EN
We investigate numerically transmittance of polarized electromagnetic wave through periodic and aperiodic binary multilayered nanostructures made of left- and right-handed materials. The transmittance is calculated as a function of light wavelength and incidence angle as well as ordering, refractive indices and thicknesses of superlattice layers. Thanks to extension of the transfer matrix formalism over the case of complex refraction angles, such effects as tunnelling, absorption and strong dispersion in left-handed metamaterials are taken into account. We find that these effects cannot be neglected and cause new transmission bands to appear in the areas where total internal reflection in a single metamaterial layer occurs.
5
Content available remote Nanolaser on heavy hole transition in semiconductor nanocrystals
Pokutnyi S.I., Salejda W., Jacak L., Misiewicz J., Tyc M.
Optica Applicata
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2002
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Vol. 32, nr 1-2
147-156
EN
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
6
Content available remote Giant absorption of light in quasi-zero-dimensional structures
Pokutnyi S.I., Salejda W., Jacak L., Misiewicz J., Tyc M.
Optica Applicata
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2001
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Vol. 31, nr 3
659-671
EN
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.
7
Content available remote XIII Konferencja: Nauczanie Fizyki w Wyższych Szkołach Technicznych [Ze zjazdów i konferencji]
Dobierzewska-Mozrzymas E., Misiewicz J., Poprawski R., Salejda W.
Postępy Fizyki
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2000
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T. 51, z. 5
265-267
PL
W dniach 26-28 czerwca 2000 r. odbyła się we Wrocławiu XIII Konferencja: Nauczanie Fizyki w Wyższych Szkołach Technicznych, zorganizowana przez Instytut Fizyki Politechniki Wrocławskiej i Polskie Towarzystwo Fizyczne.
8
Content available remote Numerical matrix method for solving stationary one - dimensional Schrödinger equation : AMSSE program
Tyc M. H., Salejda W., Just M.
Computational Methods in Science and Technology
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2000
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Vol. 6
73-100
EN
An implementation of numerical algebraic methods of solving a stationary one-dimensional Schrödinger equation (SODSE) is presented. In the framework of the proposed approach, SODSE is converted into an algebraic eigenvalue problem, which represents a discrete version of studied problem on an equally spaced grid. The AMSSE program written in Delphi calculates eigenvalues and corresponding eigenvectors by means of various methods and algorithms described here. It is an efficient and valuable computational environment, which can be used in science and nanotechnology. Arbitrary potentials can be introduced into AMSSE program in the form of analytic formulae or data tables, or with the mouse. The user-friendly graphical interface takes advantage of full capabilities of the Windows operating system. Main program features are described. Efficiency and accuracy of different numerical algorithms are comprehensively tested and compared. Factors influencing accuracy are discussed. Examples are widely presented. Matrix approach extension to the case of an effective-mass equation is mentioned
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