Anisotropy and amplification of terahertz electromagnetic response enabled by direct electric current in graphene
The purpose of this study is to investigate the polarization conversion and amplification of electromagnetic terahertz (THz) wave incident normally upon graphene monolayer with direct electric current flowing at arbitrary angle to the elecric vector of incident wave. Methods. The expressions for th...
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| Format: | Article |
| Language: | English |
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Saratov State University
2025-01-01
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| Series: | Известия высших учебных заведений: Прикладная нелинейная динамика |
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| Online Access: | https://andjournal.sgu.ru/sites/andjournal.sgu.ru/files/text-pdf/2025/01/and_2025-1_moiseenko_et-al_19-26.pdf |
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| author | Моисеенко , Илья Михайлович Fateev, Denis Васильевич Popov, Vyacheslav Valentinovich |
| author_facet | Моисеенко , Илья Михайлович Fateev, Denis Васильевич Popov, Vyacheslav Valentinovich |
| author_sort | Моисеенко , Илья Михайлович |
| collection | DOAJ |
| description | The purpose of this study is to investigate the polarization conversion and amplification of electromagnetic terahertz (THz) wave incident normally upon graphene monolayer with direct electric current flowing at arbitrary angle to the elecric vector of incident wave. Methods. The expressions for the elements of the dynamic conductivity tensor of graphene were obtained in hydrodynamic approximation. The electromagnetic response is calculated by solving the Maxwell equations with standard boundary conditions for lateral components of the electric and magnetic fields. Results. It is shown that the dynamic conductivity of graphene depends on value and direction of the electron drift velocity even in the absence of the spatial dispersion. This results in the polarization conversion of electromagnetic radiation at THz frequencies. The real parts of elements of graphene dynamic conductivity tensor can become negative which leads to the amplification of THz oscillations. Conclusion. The polarization conversion and amplification of electromagnetic THz wave incident upon graphene with direct electric current is demonstrated. Polarization conversion efficiency can be as high as 97 percent. |
| format | Article |
| id | doaj-art-3abd17bdcfe64592913f6eeabde8c18a |
| institution | Kabale University |
| issn | 0869-6632 2542-1905 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Saratov State University |
| record_format | Article |
| series | Известия высших учебных заведений: Прикладная нелинейная динамика |
| spelling | doaj-art-3abd17bdcfe64592913f6eeabde8c18a2025-01-31T04:16:40ZengSaratov State UniversityИзвестия высших учебных заведений: Прикладная нелинейная динамика0869-66322542-19052025-01-01331192610.18500/0869-6632-003127Anisotropy and amplification of terahertz electromagnetic response enabled by direct electric current in grapheneМоисеенко , Илья Михайлович0Fateev, Denis Васильевич1Popov, Vyacheslav Valentinovich2Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny, Moscow Region, 141700, Russian FederationSaratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences, ul. Zelyonaya, 38, Saratov, 410019, RussiaSaratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences, ul. Zelyonaya, 38, Saratov, 410019, RussiaThe purpose of this study is to investigate the polarization conversion and amplification of electromagnetic terahertz (THz) wave incident normally upon graphene monolayer with direct electric current flowing at arbitrary angle to the elecric vector of incident wave. Methods. The expressions for the elements of the dynamic conductivity tensor of graphene were obtained in hydrodynamic approximation. The electromagnetic response is calculated by solving the Maxwell equations with standard boundary conditions for lateral components of the electric and magnetic fields. Results. It is shown that the dynamic conductivity of graphene depends on value and direction of the electron drift velocity even in the absence of the spatial dispersion. This results in the polarization conversion of electromagnetic radiation at THz frequencies. The real parts of elements of graphene dynamic conductivity tensor can become negative which leads to the amplification of THz oscillations. Conclusion. The polarization conversion and amplification of electromagnetic THz wave incident upon graphene with direct electric current is demonstrated. Polarization conversion efficiency can be as high as 97 percent.https://andjournal.sgu.ru/sites/andjournal.sgu.ru/files/text-pdf/2025/01/and_2025-1_moiseenko_et-al_19-26.pdfhydrodynamic graphene conductivityterahertz radiationpolarisation conversionamplification |
| spellingShingle | Моисеенко , Илья Михайлович Fateev, Denis Васильевич Popov, Vyacheslav Valentinovich Anisotropy and amplification of terahertz electromagnetic response enabled by direct electric current in graphene Известия высших учебных заведений: Прикладная нелинейная динамика hydrodynamic graphene conductivity terahertz radiation polarisation conversion amplification |
| title | Anisotropy and amplification of terahertz electromagnetic response enabled by direct electric current in graphene |
| title_full | Anisotropy and amplification of terahertz electromagnetic response enabled by direct electric current in graphene |
| title_fullStr | Anisotropy and amplification of terahertz electromagnetic response enabled by direct electric current in graphene |
| title_full_unstemmed | Anisotropy and amplification of terahertz electromagnetic response enabled by direct electric current in graphene |
| title_short | Anisotropy and amplification of terahertz electromagnetic response enabled by direct electric current in graphene |
| title_sort | anisotropy and amplification of terahertz electromagnetic response enabled by direct electric current in graphene |
| topic | hydrodynamic graphene conductivity terahertz radiation polarisation conversion amplification |
| url | https://andjournal.sgu.ru/sites/andjournal.sgu.ru/files/text-pdf/2025/01/and_2025-1_moiseenko_et-al_19-26.pdf |
| work_keys_str_mv | AT moiseenkoilʹâmihajlovič anisotropyandamplificationofterahertzelectromagneticresponseenabledbydirectelectriccurrentingraphene AT fateevdenisvasilʹevič anisotropyandamplificationofterahertzelectromagneticresponseenabledbydirectelectriccurrentingraphene AT popovvyacheslavvalentinovich anisotropyandamplificationofterahertzelectromagneticresponseenabledbydirectelectriccurrentingraphene |