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Amplification of terahertz radiation in carbon nanotubes

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dc.contributor.author Abukari, Sulemana S.
dc.contributor.author Adu, Kofi W.
dc.contributor.author Mensah, Samuel Y.
dc.contributor.author Mensah, Natalia G.
dc.contributor.author Dompreh, Kwadwo A.
dc.contributor.author Twum, Anthony
dc.contributor.author Rabiu, Musah
dc.date.accessioned 2021-10-12T09:34:56Z
dc.date.available 2021-10-12T09:34:56Z
dc.date.issued 2013-04-24
dc.identifier.issn 23105496
dc.identifier.uri http://hdl.handle.net/123456789/6197
dc.description 6p:, ill. en_US
dc.description.abstract We investigate theoretically the feasibility of amplification of terahertz radiation in aligned achiral carbon nanotubes, a zigzag (12,0) and an armchair (10,10) in comparison with a superlattice using a combination of a constant direct current (dc) and a high-frequency alternate current (ac) electric fields. The electric current density expression is derived using the semiclassical Boltzmann transport equation with a constant relaxation time. The electric field is applied along the nanotube axis. Analysis of the current density versus electric field characteristics reveals a negative differential conductivity behavior at high frequency, as well as photon assisted peaks. The photon assisted peaks are about an order of magnitude higher in the carbon nanotubes compared to the superlattice. These strong phenomena in carbon nanotubes can be used to obtain domainless amplification of terahertz radiation at room temperature en_US
dc.language.iso en en_US
dc.publisher University of Cape Coast en_US
dc.title Amplification of terahertz radiation in carbon nanotubes en_US
dc.type Article en_US


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