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Negative dielectric permittivity of nonmagnetic crystals in the terahertz waveband
Physical conditions for occurrence of the spectral bands with the negative dielectric permittivity in nonmagnetic crystalline media in the terahertz waveband have been studied in this work. It has been shown that damping the polar vibrations has a primary effect on formation of the negative diele...
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Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2012
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| Series: | Semiconductor Physics Quantum Electronics & Optoelectronics |
| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/118282 |
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irk-123456789-1182822017-05-30T03:03:26Z Negative dielectric permittivity of nonmagnetic crystals in the terahertz waveband Felinskyi, S.G. Korotkov, P.A. Felinskyi, G.S. Physical conditions for occurrence of the spectral bands with the negative dielectric permittivity in nonmagnetic crystalline media in the terahertz waveband have been studied in this work. It has been shown that damping the polar vibrations has a primary effect on formation of the negative dielectric permittivity in real crystals at resonance (terahertz) frequencies, and phonon attenuation imposes significant restrictions both on the frequency range and the minimum achievable value for all dielectric tensor components. Within frameworks of the single-oscillator model, the authors have obtained: i) the criterion for the existence of the negative dielectric permittivity, which is based on physical and spectroscopic parameters of the crystal, ii) analytical expressions for calculation of the frequency band where the dielectric permittivity takes negative values. Frequency regions and the minimum value of negative dielectric permittivity are quantitatively defined in the crystal LiTaO₃. It is proved the applicability of the obtained relationships in cases of relatively complex phonon vibration spectra. 2012 Article Negative dielectric permittivity of nonmagnetic crystals in the terahertz waveband / S.G. Felinskyi, P.A. Korotkov, G.S. Felinskyi // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2012. — Т. 15, № 1. — С. 83-88. — Бібліогр.: 9 назв. — англ. 1560-8034 PACS 77.22.Ch, 77.84.Ek http://dspace.nbuv.gov.ua/handle/123456789/118282 en Semiconductor Physics Quantum Electronics & Optoelectronics Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
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DSpace DC |
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English |
| description |
Physical conditions for occurrence of the spectral bands with the negative
dielectric permittivity in nonmagnetic crystalline media in the terahertz waveband have
been studied in this work. It has been shown that damping the polar vibrations has a
primary effect on formation of the negative dielectric permittivity in real crystals at
resonance (terahertz) frequencies, and phonon attenuation imposes significant restrictions
both on the frequency range and the minimum achievable value for all dielectric tensor
components. Within frameworks of the single-oscillator model, the authors have
obtained: i) the criterion for the existence of the negative dielectric permittivity, which is
based on physical and spectroscopic parameters of the crystal, ii) analytical expressions
for calculation of the frequency band where the dielectric permittivity takes negative
values. Frequency regions and the minimum value of negative dielectric permittivity are
quantitatively defined in the crystal LiTaO₃. It is proved the applicability of the obtained
relationships in cases of relatively complex phonon vibration spectra. |
| format |
Article |
| author |
Felinskyi, S.G. Korotkov, P.A. Felinskyi, G.S. |
| spellingShingle |
Felinskyi, S.G. Korotkov, P.A. Felinskyi, G.S. Negative dielectric permittivity of nonmagnetic crystals in the terahertz waveband Semiconductor Physics Quantum Electronics & Optoelectronics |
| author_facet |
Felinskyi, S.G. Korotkov, P.A. Felinskyi, G.S. |
| author_sort |
Felinskyi, S.G. |
| title |
Negative dielectric permittivity of nonmagnetic crystals in the terahertz waveband |
| title_short |
Negative dielectric permittivity of nonmagnetic crystals in the terahertz waveband |
| title_full |
Negative dielectric permittivity of nonmagnetic crystals in the terahertz waveband |
| title_fullStr |
Negative dielectric permittivity of nonmagnetic crystals in the terahertz waveband |
| title_full_unstemmed |
Negative dielectric permittivity of nonmagnetic crystals in the terahertz waveband |
| title_sort |
negative dielectric permittivity of nonmagnetic crystals in the terahertz waveband |
| publisher |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| publishDate |
2012 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/118282 |
| citation_txt |
Negative dielectric permittivity of nonmagnetic crystals in the terahertz waveband / S.G. Felinskyi, P.A. Korotkov, G.S. Felinskyi // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2012. — Т. 15, № 1. — С. 83-88. — Бібліогр.: 9 назв. — англ. |
| series |
Semiconductor Physics Quantum Electronics & Optoelectronics |
| work_keys_str_mv |
AT felinskyisg negativedielectricpermittivityofnonmagneticcrystalsintheterahertzwaveband AT korotkovpa negativedielectricpermittivityofnonmagneticcrystalsintheterahertzwaveband AT felinskyigs negativedielectricpermittivityofnonmagneticcrystalsintheterahertzwaveband |
| first_indexed |
2023-10-18T20:31:43Z |
| last_indexed |
2023-10-18T20:31:43Z |
| _version_ |
1796150438828965888 |