Acoustoelectric direct current density in fluorine doped single-walled carbon nanotubes due to harmonic mixing of bichromatic fields with commensurate frequencies

Sekyi-Arthur, D.; Mensah, S.Y.; Amewode, E.K.; Arthur, R.; Adams, R.R.

doi:10.1016/j.diamond.2023.109993

Diamond and Related Materials

2023

DOI: 10.1016/j.diamond.2023.109993

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Acoustoelectric direct current density in fluorine doped single-walled carbon nanotubes due to harmonic mixing of bichromatic fields with commensurate frequencies

D. Sekyi-Arthur,

S.Y. Mensah,

E.K. Amewode

et al.

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2024

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Cited by 2 publications

References 33 publications

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High frequency amplification of acoustic phonons in fluorine-doped single-walled carbon nanotubes

Sekyi-Arthur,

Mensah,

Amewode

et al. 2024

Diamond and Related Materials

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High frequency amplification of acoustic phonons in fluorine-doped single-walled carbon nanotubes

Sekyi-Arthur,

Mensah,

Amewode

et al. 2024

Diamond and Related Materials

View full text Add to dashboard Cite

Tunable High-Frequency Acoustoelectric Current Oscillations in Fluorine-Doped Single-Walled Carbon Nanotubes

Sekyi-Arthur,

Mensah,

Wi-Adu

et al. 2024

Journal of Nanotechnology

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Herein, we report on a fluorine-doped single-walled carbon nanotube (FSWCNT) phenomenon, that yields tunable high-frequency self-sustained acoustoelectric direct current (ADC) oscillations. A tractable analytical method was used in the hypersound domain, to base the calculations on carriers in the lowest miniband. Hypothetically, the energy of interaction between the carriers and the acoustic phonons is less than the energy of the typical carriers. High-order harmonics of the acoustic phonons’ effective field could be disregarded under this supposition. The ADC was observed to exhibit a nonlinearity, that resulted from the carrier distribution function’s distortion as a result of interaction with the acoustic phonons, which had strong nonlinear effects. Theoretically, we demonstrated that the dynamics of space charge instabilities, due to Bragg reflection of Bloch oscillating carriers in the FSWCNT’s miniband, were the only factors which contributed to the creation of radiation in the terahertz (THz) frequency range. The study also investigated the influence of various FSWCNT parameters such as the overlapping integrals (Δs and Δz), ac-field E1, and carrier concentration noon the behaviour of the ADC. The results showed that the intensity of the ADC oscillation Jzzae/Joae could be tuned by adjusting Δs, Δz, E1, and no.This tunability suggests that FSWCNTs could be used as an active device operating at very high frequencies, potentially reaching the submillimeter wavelength range. The study also suggests the possibility of domain suppression and acoustic Bloch gain through dynamic ADC stabilisation.

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Acoustoelectric direct current density in fluorine doped single-walled carbon nanotubes due to harmonic mixing of bichromatic fields with commensurate frequencies

Cited by 2 publications

References 33 publications

High frequency amplification of acoustic phonons in fluorine-doped single-walled carbon nanotubes

High frequency amplification of acoustic phonons in fluorine-doped single-walled carbon nanotubes

Tunable High-Frequency Acoustoelectric Current Oscillations in Fluorine-Doped Single-Walled Carbon Nanotubes

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