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Polar optical modes in Fibonacci heterostructures
Author(s) -
PérezÁlvarez R.,
GarcíaMoliner F.,
TralleroGiner C.,
Velasco V. R.
Publication year - 2000
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/1097-4555(200005)31:5<421::aid-jrs532>3.0.co;2-7
Subject(s) - fibonacci number , heterojunction , raman spectroscopy , polar , diffraction , vibrational spectrum , dimension (graph theory) , spectrum (functional analysis) , fractal , vibration , physics , chemistry , optics , materials science , condensed matter physics , quantum mechanics , mathematics , mathematical analysis , combinatorics
The spectrum of polar optical modes in Fibonacci heterostructures of III–V compounds is studied and a full account of the couplings between mechanical—sagittal—vibrations and electrostatic field is provided. It is found that, while the spectrum has always a fractal dimension, no precisely defined self‐similarity can be obtained for realistic models involving different‐coupled components. An interpretation is proposed in terms of wave diffraction by the quasiregular heterostructure. The use of micro‐Raman spectroscopy to study the normal mode spectrum for these systems is indicated. Copyright © 2000 John Wiley & Sons, Ltd.