scholarly journals Атомная структура и оптические свойства слоев CaSi-=SUB=-2-=/SUB=-, выращенных на CaF-=SUB=-2-=/SUB=-/Si-подложках

2021 ◽  
Vol 55 (9) ◽  
pp. 725
Author(s):  
В.А. Зиновьев ◽  
А.В. Кацюба ◽  
В.А. Володин ◽  
А.Ф. Зиновьева ◽  
С.Г. Черкова ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electron Beam ◽  
High Energy ◽  
Two Dimensional ◽  
High Energy Electron ◽  
Photoluminescence Spectra ◽  
Structural And Optical Properties ◽  
Synthesis Conditions ◽  
Simultaneous Irradiation ◽  
Growth Features

In this work, we study the growth features, as well as the structural and optical properties of CaSi2 layers formed in the process of successive deposition of Si and CaF2 on a Si (111) substrate with simultaneous irradiation with high energy electron beam. The Raman spectra recorded in the regions of the electron beam action showed peaks characteristic of crystalline CaSi2 layers. The study of the surface morphology of the grown structures demonstrated that, under the chosen synthesis conditions, the formation of CaSi2 layers during electron irradiation occurs according to a two-dimensional layer mechanism. The photoluminescence spectra measured in the region modified by the electron beam have significant differences from the spectra measured outside this region.

scholarly journals Ellipsometric Detection of Transitional Surface Structures on Decapped GaAs(001)

2005 ◽  
Vol 295-296 ◽  
pp. 45-50 ◽  
Author(s):  
A.V. Vasev ◽  
S.I. Chikichev
Keyword(s):  
Optical Properties ◽  
High Energy ◽  
Surface Structures ◽  
Optical Data ◽  
Clear Correlation ◽  
High Energy Electron ◽  
Structural And Optical Properties ◽  
First Time ◽  
Disorder Type ◽  
Boundary Lines

Structural and optical properties of MBE-grown GaAs(001) surface have been studied by reflection high-energy electron diffraction and single-wavelength ellipsometry under dynamic conditions of ramp heating after desorption of passivating As-cap-layer with and without As4 beam applied to the surface. For a number metastable reconstruction transitions, a clear correlation is established between diffraction and optical data. Boundary lines for transitional superstructures are determined as a function of As flux and corresponding activation energies are estimated. For the first time it is ellipsometrically shown that optical response of the surface is drastically different for transitions of the order-order and order-disorder type.

Parabolas from Reconstructed Surfaces Observed in Convergent-Beam RHEED Patterns

1990 ◽  
Vol 48 (2) ◽  
pp. 398-399
Author(s):  
M. Gajdardziska-Josifovska
Keyword(s):  
Electron Microscopy ◽  
High Energy ◽  
Two Dimensional ◽  
High Energy Electron ◽  
Reflection And Transmission ◽  
Experimental Diffraction Pattern ◽  
Surface Resonance ◽  
Reconstructed Surfaces ◽  
Reflection Electron Microscopy ◽  
Convergent Beam

Parabolas have been observed in the reflection high-energy electron diffraction (RHEED) patterns from surfaces of single crystals since the early thirties. In the last decade there has been a revival of attempts to elucidate the origin of these surface parabolas. The renewed interest stems from the need to understand the connection between the parabolas and the surface resonance (channeling) condition, the latter being routinely used to obtain higher intensity in reflection electron microscopy (REM) images of surfaces. Several rather diverging descriptions have been proposed to explain the parabolas in the reflection and transmission Kikuchi patterns. Recently we have developed an unifying general treatment in which the parabolas are shown to be K-lines of two-dimensional lattices. Here we want to review the main features of this description and present an experimental diffraction pattern from a 30° MgO (111) surface which displays parabolas that can be attributed to the surface reconstruction.

A high energy electron beam facility for industrial research

2002 ◽  
Author(s):  
S. Okuda ◽  
T. Nakanishi ◽  
K. Ikegami ◽  
S. Nakata ◽  
T. Nakagawa ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Energy ◽  
Industrial Research ◽  
Energy Electron ◽  
High Energy Electron
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