Resonant absorption of electromagnetic radiation in a quantum channel due to the scattering of electrons by impurities

Karpunin, V. V.; Margulis, V. A.

doi:10.1134/s0030400x17060108

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…Mathematically, the values of the absorption coefficient and the FWHM are governed mainly by the transition matrix element given in Eq. (5). Moreover, the smaller the wire radius, the clearer the difference.…”

Section: Numerical Results and Discussionmentioning

confidence: 98%

“…where c is speed of light in vacuum, 𝑓 𝑖 is the electron distribution function in the initial state, 𝜖 𝑟 is the dielectric constant of the material, and 𝑁 𝑓 is the number of photons with energy ℏ𝜔. According to the second-order Born approximation, the state transition probability of the electron has the form [5]:…”

Section: Analytic Expression For the Ac In Cqwmentioning

confidence: 99%

“…Here, 𝐻 𝑟 , 𝑉 𝑠 are, respectively, the electronphoton interacting Hamiltonian and the screened potential of ionized impurities which have the forms as given in [5][6][7]. Performing the straight-forward calculation of the expressions of the transition matrix elements due to electron-photon interaction and electron-impurity scattering, we obtain the expression of the optical coefficient in the cylindrical quantum wire as…”

Section: Analytic Expression For the Ac In Cqwmentioning

confidence: 99%

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Effect of Electron-impurity Interaction on the Optical Absorption in A Quasi-one-dimensional Electron System

Phong

Linh²,

Nam³

et al. 2023

MaP

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In this work, we investigated the optical absorption in a quasi-one-dimensional system subjected to an external electromagnetic wave. The optical absorption coefficient was calculated by using the perturbation theory taking account of the effect of the electron - impurity interaction. The numerical result for the GaAs/AlAs cylindrical semiconductor quantum wire showed the presence of the resonant absorption peaks. The full width at half maximum (FWHM) decreased with increasing the wire radius and increases with increasing temperature. In particular, in the limit of large wire radius, the contribution of transitions between electronic subbands to the absorption spectrum becomes identical, t meaning that the system tends to behave as a bulk (there-dimensional) system when the confinement length is large. The obtained results are of significance for further studies and applications of the low dimensional systems in nano-optoelectronic devices.

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Section: Numerical Results and Discussionmentioning

confidence: 98%

Section: Analytic Expression For the Ac In Cqwmentioning

confidence: 99%