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- Title
Polarization conversion effect in obliquely deposited SiO<sub>x</sub> films.
- Authors
Sopinskyy, M. V.; Indutnyi, I. Z.; Michailovska, K. V.; Shepeliavyi, P. E.; Tkach, V. M.
- Abstract
Structural anisotropy of the SiOx films and nc-Si - SiOx light emitting nanostructures, prepared by oblique deposition of silicon monoxide in vacuum, has been studied using the polarization conversion (PC) effect. For this purpose, a simple method of PC investigation with usage of a standard null-ellipsometer is proposed and tested. This method is based on the analysis of the azimuthal angle dependence of the off- diagonal elements of the Jones matrix. The electron microscopy study shows that obliquely deposited SiOx films have a porous (column-like) structure with the column diameter and inclination depending on the deposition angle. Polarimetric investigations revealed that both in-plane and out-of-plane anisotropy was present, which is associated with the columnar growth. The correlation between the PC manifestations and the scanning electron microscopy results is analyzed. It was found that the tilt angle of columns in obliquely deposited SiOx is smaller than that predicted by the "tangent rule" and "cosine rule" models, and depends on the crystallographic orientation of Si substrate. It is concluded that the proposed method is effective non-destructive express technique for the structural characterization of obliquely deposited films.
- Subjects
OPTICAL polarization; SILICON oxide films; LIGHT emitting diodes; NANOSTRUCTURED materials; ELLIPSOMETRY; CRYSTALLOGRAPHY; ELECTRON microscopy
- Publication
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2011, Vol 14, Issue 3, p273
- ISSN
1560-8034
- Publication type
Article