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Sulemana?S.?Abukari Kofi?W.?AduEmail author Samuel?Y.?Mensah Natalia?G.?Mensah Kwadwo?A.?Dompreh Anthony?Twum Musah?Rabiu 《The European Physical Journal B - Condensed Matter and Complex Systems》2013,86(4):182
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. 相似文献
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Abukari S. S. Musah R. Amekpewu M. Mensah S. Y. Mensah N. G. Edziah R. Adu K. W. 《Journal of Experimental and Theoretical Physics》2020,131(3):456-459
Journal of Experimental and Theoretical Physics - The novel effect of direct current generation by carbon nanotubes with hot electron injection which may arise due to an electromagnetic radiation... 相似文献
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