The Nonlinear Absorption Coefficient of Strong Electromagnetic Waves Caused by Confined Electrons in Quantum Wires

Trien, Hoang Dinh; Bau, Nguyen Quang

doi:10.3938/jkps.56.120

Cited by 23 publications

(6 citation statements)

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“…This quantity is considered to be a function of the temperature T, the Fermi energy ¾ F and the radius R of CQWIP GaAs/GaAsAl. The parameters used in the numerical calculations 6,13) are as follow:¸= 10 ¹12 s, º = 10 4 W m ¹2 , μ = 5320 kg m ¹3 , v l = 2 © 10 3 m s…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…6) Also, study on the effect of AE in the normal bulk semiconductor has received a lot of attention. 710) Further, the AE effect was measured experimentally in a submicronseparated quantum wire 11) and in a carbon nano-tube.…”

Section: )mentioning

confidence: 99%

“…Throughout, 5,6) the quantum kinetic equation method have been seen as a powerful tool. So, in a recent work 13) we have used this method to calculate the QAME field in a QW.…”

Section: )mentioning

confidence: 99%

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The Dependence of a Quantum Acoustoelectric Current on Some Qualities in a Cylindrical Quantum Wire with an Infinite Potential GaAs/GaAsAl

Nhan¹,

Nghĩa

Hiếu

2015

Mater. Trans.

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The quantum acoustoelectric (QAE) current is studied by a quantum kinetic equation method and we obtain analytic expression for QAE in a cylindrical quantum wire with an infinite potential (CQWIP) GaAs/GaAsAl. The computational results show that the dependence of the QAE current on the radius of CQWIP GaAs/GaAsAl, the Fermi energy ¾ F and temperature T is non-monotonic, and the appearance of peak when the(n 6 ¼ n 0 and N 6 ¼ N 0 ) is satisfied. Our result indicates that the dominant mechanism for such a behavior is the electron confinement in the CQWIP GaAs/GaAsAl and transitions between mini-bands. All these results are compared with those for normal bulk semiconductors and superlattice to show the differences. The dependence of a QAE current on some qualities in a CQWIP GaAs/GaAsAl is newly developed. Keywords: cylindrical quantum wire, quantum acoustoelectric current, electron-external acoustic wave interaction, electron-acoustic phonon scattering, quantum kinetic equation

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Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: )mentioning

confidence: 99%

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The Dependence of a Quantum Acoustoelectric Current on Some Qualities in a Cylindrical Quantum Wire with an Infinite Potential GaAs/GaAsAl

Nhan¹,

Nghĩa

Hiếu

2015

Mater. Trans.

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“…This approach allows us to take into account the rate of change in unbalanced electron distribution function, and thus, shows the electron-phonon interaction picture clearly under the influence of a laser radiation field. This is the reason why this method has been used effectively in the study of EMW absorption effects in bulk semiconductors [8], Quantum wells [12], and Cylindrical quantum wires [13]. In the next section, we give the theoretical basis and basic calculations.…”

Section: Introductionmentioning

confidence: 99%

The Influence of an External Magnetic Field on Multi-photon Non-linear Absorption Coefficient of a Strong Electromagnetic Wave in Two-dimensional Graphene

Tuan,

Vi Ba,

Dinh Nam

2024

MaP

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Based on the quantum kinetic equation for electrons, we theoretically study the Quantum Multi-photon Nonlinear Absorption of a Strong Electromagnetic Wave (EMW) in two-dimensional Graphene with electron-optical phonon scattering mechanism. The general multi-photon absorption coefficient is presented as a function of the temperature, the external magnetic field, the photon energy, and the amplitude of external EMW. The results show that in the presence of the magnetic field, absorption spectral lines appear consistent with the magneto-phonon resonance conditions. In which, the effect of multi-photon absorption is stronger than that of mono-photon absorption. Besides, the quantum multi-photon nonlinear absorption phenomenon has been studied from low temperature to high temperature. This transcends the limits of the classical Boltzmann kinetic equation which is studied in the high-temperature domain. The computational results show that the dependence of Multi-photon Nonlinear Absorption Coefficient (MNAC) on the above quantities is consistent with the previous theoretical investigation. Another novel feature of this work is that the general analytic expression for MNAC shows the Half Width at Half Maximum (HWHM) dependence on the magnetic field which is in good agreement with the previous experimental observations. Thus, our estimation might give a critical prediction for future experimental observations in graphene. Keywords: Multi-photon non-linear absorption coefficient, 2D graphene, quantum kinetic equation, strong electromagnetic wave, electron-phonon scattering, magneto-phonon resonance.

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“…Then, the size effect appeared and makes almost physical properties of material change [1]. The properties of low-dimension system such as: Hall effect [2][3][4], absorption of electromagnetic waves, relative magnetoresistance, etc [5][6][7][8] are very different from the previous work studied on bulk semiconductor [9][10][11][12]. The magneto-thermoelectric effect, often called as Ettingshausen effect, which has just been researched in bulk semiconductors [13][14][15][16] is one of the electrical, magnetic and thermal effects of semiconductor systems.…”

Section: Introductionmentioning

confidence: 99%

Magneto-thermoelectric Effects in Cylindrical Quantum Wire under the Influence of Electromagnetic Wave for Electron-optical Phonon Scattering

Hung

Bau²,

Quang³

2019

MaP

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This paper studies the influence of a strong electromagnetic wave (EMW) on the magneto-thermoelectric effects in a cylindrical quantum wire with an infinite potential (CQWIP) (for electron - optical phonon scattering) under the influence of electric field , magnetic field and a strong EMW (laser radiation) (where and are amplitude and frequency of EMW, respectively), based on the quantum kinetic equation for electrons. The study obtained the analytic expressions for the kinetic tensors and the Ettingshausen coefficient (EC) in the CQWIP with the dependence on the frequency, the amplitude of EMW, the Quantum Wire (CQWIP) parameters, the magnetic field and the temperature. The study results were numerically evaluated and graphed for GaAs/GaAsAl quantum wire. Then, the results in this case were compared with those in the case of the bulk semiconductors and other low-dimension systems in order to show the difference and the novelty of the current results. Moreover, it is realized that as the EMW frequency increases, the EC fluctuates with a stable trend, and the appearance of the Shubnikov-de Haas (SdH) oscillations pattern when the dependence of EC on the magnetic field is surveyed.

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The Nonlinear Absorption Coefficient of Strong Electromagnetic Waves Caused by Confined Electrons in Quantum Wires

Cited by 23 publications

References 0 publications

The Dependence of a Quantum Acoustoelectric Current on Some Qualities in a Cylindrical Quantum Wire with an Infinite Potential GaAs/GaAsAl

The Dependence of a Quantum Acoustoelectric Current on Some Qualities in a Cylindrical Quantum Wire with an Infinite Potential GaAs/GaAsAl

The Influence of an External Magnetic Field on Multi-photon Non-linear Absorption Coefficient of a Strong Electromagnetic Wave in Two-dimensional Graphene

Magneto-thermoelectric Effects in Cylindrical Quantum Wire under the Influence of Electromagnetic Wave for Electron-optical Phonon Scattering

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