DocumentCode :
2888970
Title :
Criterion for the appearance of negative dielectric areas in crystals
Author :
Felinskyi, S.G. ; Felinskyi, G.S.
Author_Institution :
Taras Shevchenko Kyiv Nat. Univ., Kiev, Ukraine
fYear :
2010
fDate :
12-14 Sept. 2010
Firstpage :
58
Lastpage :
59
Abstract :
Damping of the polar vibrations determines the real limits of negative dielectric permittivity (DP) region as shown in this work. We obtain the simple quantitative criterion for the negative DP existence in the single oscillatory approximation model. We introduce this criterion as inequality between the damping constant and T-L frequency splitting of the polar phonon. This inequality is the sufficient condition for existence of negative dielectric permittivity and it is shown its applicability to the many oscillation cases.
Keywords :
damping; dielectric function; dielectric materials; permittivity; phonons; vibrational modes; T-L frequency splitting; damping constant; dielectric function; negative dielectric permittivity; polar phonon; polar vibrations; Crystals; Damping; Dielectrics; Dispersion; Permittivity; Phonons; Vibrations;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Laser and Fiber-Optical Networks Modeling (LFNM), 2010 10th International Conference on
Conference_Location :
Sevastopol
Print_ISBN :
978-1-4244-6994-9
Type :
conf
DOI :
10.1109/LFNM.2010.5624249
Filename :
5624249
Link To Document :
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