Мiкрохвилi у структурованих метаматерiалiв: понадсвiтовi, повiльнi, i зворотнi хвилi
The dispersion properties of structured metamaterials consisting of strips of a copper wire (electron subsystem) and square copper split-ring resonators (magnetic subsystem) with different and coinciding resonant frequencies are studied. In a narrow frequency band above the resonant frequency of the...
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| Sprache: | English |
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2019
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ujp2-article-20191132019-04-16T20:07:57Z Microwaves in Structured Metamaterials: Supeluminal, Slow, and Backward Waves Мiкрохвилi у структурованих метаматерiалiв: понадсвiтовi, повiльнi, i зворотнi хвилi Ahmed, A. Mal’nev, V. N. Mesfin, B. structured metamaterials supeluminal waves slow waves backward waves - The dispersion properties of structured metamaterials consisting of strips of a copper wire (electron subsystem) and square copper split-ring resonators (magnetic subsystem) with different and coinciding resonant frequencies are studied. In a narrow frequency band above the resonant frequency of the electron subsystem, the structured metamaterial is described by a negative refractive index. In addition to this, there are some peculiar properties observed in these metamaterials. Among these properties is the nonanalytic behavior of the real part of the refractive index as a function of the frequency with a discontinuity of its derivative in the metamaterial with two resonances. It is also shown that the superluminal, slow, and backward microwaves can exist in the structured metamaterials. However, in the absence of gain components, only the slow microwaves can propagate considerably. Дослiджуються дисперсiйнi властивостi структурованих метаматерiалiв, що складаються зi смужок з мiдних дротикiв (електронна пiдсистема) i квадратних резонаторiв з мiдним розрiзаним кiльцем (магнiтна пiдсистема) з рiзними i збiгаючими резонансними частотами. У вузькiй смузi частот вище резонансної частоти електронної пiдсистеми структурованi метаматерiали характеризуються негативним iндексом заломлення. В цих метаматерiалiв виявлено також таку особливу властивiсть, як неаналiтичнiсть дiйсної компоненти iндексу заломлення як функцiї частоти з особливою точкою ї ї похiдної в метаматерiалi з двома резонансами. Показано, що в структурованих метаматерiалах можуть поширюватися суперсвiтовi, повiльнi i зворотнi мiкрохвилi. Однак за вiдсутностi пiдживлючих компонент, iстотно тiльки поширення повiльних мiкрохвиль. Publishing house "Academperiodika" 2019-01-08 Article Article Peer-reviewed Рецензована стаття application/pdf https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019113 10.15407/ujpe61.02.0125 Ukrainian Journal of Physics; Vol. 61 No. 2 (2016); 125 Український фізичний журнал; Том 61 № 2 (2016); 125 2071-0194 2071-0186 10.15407/ujpe61.02 en https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019113/1023 Copyright (c) 2019 Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine |
| institution |
Ukrainian Journal of Physics |
| baseUrl_str |
|
| datestamp_date |
2019-04-16T20:07:57Z |
| collection |
OJS |
| language |
English |
| topic_facet |
structured metamaterials supeluminal waves slow waves backward waves - |
| format |
Article |
| author |
Ahmed, A. Mal’nev, V. N. Mesfin, B. |
| spellingShingle |
Ahmed, A. Mal’nev, V. N. Mesfin, B. Мiкрохвилi у структурованих метаматерiалiв: понадсвiтовi, повiльнi, i зворотнi хвилi |
| author_facet |
Ahmed, A. Mal’nev, V. N. Mesfin, B. |
| author_sort |
Ahmed, A. |
| title |
Мiкрохвилi у структурованих метаматерiалiв: понадсвiтовi, повiльнi, i зворотнi хвилi |
| title_short |
Мiкрохвилi у структурованих метаматерiалiв: понадсвiтовi, повiльнi, i зворотнi хвилi |
| title_full |
Мiкрохвилi у структурованих метаматерiалiв: понадсвiтовi, повiльнi, i зворотнi хвилi |
| title_fullStr |
Мiкрохвилi у структурованих метаматерiалiв: понадсвiтовi, повiльнi, i зворотнi хвилi |
| title_full_unstemmed |
Мiкрохвилi у структурованих метаматерiалiв: понадсвiтовi, повiльнi, i зворотнi хвилi |
| title_sort |
мiкрохвилi у структурованих метаматерiалiв: понадсвiтовi, повiльнi, i зворотнi хвилi |
| title_alt |
Microwaves in Structured Metamaterials: Supeluminal, Slow, and Backward Waves |
| description |
The dispersion properties of structured metamaterials consisting of strips of a copper wire (electron subsystem) and square copper split-ring resonators (magnetic subsystem) with different and coinciding resonant frequencies are studied. In a narrow frequency band above the resonant frequency of the electron subsystem, the structured metamaterial is described by a negative refractive index. In addition to this, there are some peculiar properties observed in these metamaterials. Among these properties is the nonanalytic behavior of the real part of the refractive index as a function of the frequency with a discontinuity of its derivative in the metamaterial with two resonances. It is also shown that the superluminal, slow, and backward microwaves can exist in the structured metamaterials. However, in the absence of gain components, only the slow microwaves can propagate considerably. |
| publisher |
Publishing house "Academperiodika" |
| publishDate |
2019 |
| url |
https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019113 |
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2025-10-02T01:15:52Z |
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2025-10-02T01:15:52Z |
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