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Wyszukujesz frazę "61.70.Jc" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
DSL Photoetching: Principles and Application to Study Nature of Defects in III-V Materials
Autorzy:
Weyher, J.
Powiązania:
https://bibliotekanauki.pl/articles/1888018.pdf
Data publikacji:
1991-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.60.Cp
61.70.Jc
61.70.At
Opis:
After a short general description of the chemical etching of semiconductors the mechanisms of defect-selective etching are described in detail. Two distinct mechanisms that lead to the formation of etch pits and etch hillocks on dislocations emerging at a semiconductor surface are discussed. The principles of the formation of defect-related etch features are described for the HF-CrO$\text{}_{3}$-H$\text{}_{2}$O etching system used for etching of GaAs. A model of surface reactions is presented and the influence of illumination during etching on the defect-selectivity is emphasized. The use of ultra sensitive photoetching to study the nature and origin of complex defects in SI and n-like GaAs is documented. In particular, the concept for the formation of dislocation cell structure in undoped GaAs is presented and the ability of photoetching to reveal the structural changes during annealing is visualized.
Źródło:
Acta Physica Polonica A; 1991, 80, 2; 149-160
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Sol-Gel Glasses Doped with Lanthanide Ions by Spectroscopic, Acoustic, and Positron Annihilation Methods
Autorzy:
Jerie, K.
Baranowski, A.
Legendziewicz, J.
Guzik, M.
Burakowski, A.
Gliński, J.
Powiązania:
https://bibliotekanauki.pl/articles/2047126.pdf
Data publikacji:
2006-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.30.Jc
43.35.Cg
61.20.Qg
61.25.Em
62.60.+v
78.70.Bj
Opis:
The results of optical spectroscopic (UV-Vis, absorption, and emission), acoustic (sound velocity of precursor solutions, the solvation numbers of ions in these solutions), and positron annihilation of glasses are presented and discussed for silica glasses obtained by the alcoholic sol-gel technique, doped with selected lanthanides and with some addition of ethylene glycol. The aim of these investigations was the determination of the local structure of glass close to lanthanide ions and its influence on the optical properties of the material. The results show that the existence of alcohol-glycol solvates in glasses decrease the number of empty voids in its structure as well as the size of the remaining ones. One can suppose that this is caused by cooperative interactions of glycol molecules with the network of hydrogen bonds of the glass.
Źródło:
Acta Physica Polonica A; 2006, 110, 5; 583-591
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical Pattern Fabrication in Amorphous Silicon Carbide with High-Energy Focused Ion Beams
Autorzy:
Tsvetkova, T.
Takahashi, S.
Sellin, P.
Gomez-Morilla, I.
Angelov, O.
Dimova-Malinovska, D.
Zuk, J.
Powiązania:
https://bibliotekanauki.pl/articles/1503892.pdf
Data publikacji:
2011-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
41.75.Ak
42.70.Ln
68.37.Uv
73.61.Jc
Opis:
Topographic and optical patterns have been fabricated in a-SiC films with a focused high-energy (1 MeV) $H^{+}$ and $He^{+}$ ion beam and examined with near-field techniques. The patterns have been characterized with atomic force microscopy and scanning near-field optical microscopy to reveal local topography and optical absorption changes as a result of the focused high-energy ion beam induced modification. Apart of a considerable thickness change (thinning tendency), which has been observed in the ion-irradiated areas, the near-field measurements confirm increases of optical absorption in these areas. Although the size of the fabricated optical patterns is in the micron-scale, the present development of the technique allows in principle writing optical patterns up to the nanoscale (several tens of nanometers). The observed values of the optical contrast modulation are sufficient to justify the efficiency of the method for optical data recording using high-energy focused ion beams.
Źródło:
Acta Physica Polonica A; 2011, 120, 1; 56-59
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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