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On the amplification of acoustic phonons in carbon nanotube

Show simple item record Dompreh, K. A. Mensah, N. G. Sakyi-Arthur, D. Mensah, S. Y. 2021-10-26T09:03:55Z 2021-10-26T09:03:55Z 2016
dc.identifier.issn 23105496
dc.description 12p:, ill. en_US
dc.description.abstract We present a theoretical study of acoustic phonons amplification in Carbon Nanotubes (CNT). The phenomenon is via Cerenkov emission (CE) of acoustic phonons using intraband transitions proposed by Mensah et. al., [1] in Semiconductor Superlattices (SSL) and confirmed in [2]. From this, an asymmetric graph of ΓCNT on Vd and Ωτ were obtained where amplification (ΓCNT) >> absorption (ΓCNT ). The ratio,|ΓCNT ||ΓCNT|≈ 3.5, at Vd = 1.02Vs, ωq = 3.0 THz and T = 85 K for scattering angle θ > 0 . A threshold field at which Γ CNT abs switches over to Γ CNT amp was calculated to be E Dc z = 6.2 × 103V/m. This field is far less than that deduced using Bloch Type Oscillation (BTO) [3] which is E dc O = 3.0 × 105 V/m. The obtained ΓCNT amp would enable the use of CNT for the production of SASER en_US
dc.language.iso en en_US
dc.publisher University of Cape Coast en_US
dc.subject Amplification en_US
dc.subject Carbon nanotubes en_US
dc.subject Acoustic phonon en_US
dc.subject Hypersound en_US
dc.title On the amplification of acoustic phonons in carbon nanotube en_US
dc.type Article en_US

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