Optical phonon scattering in quantum cascade laser in a magnetic field

2010 ◽  
Author(s):  
Y. Chen ◽  
N. Regnault ◽  
R. Ferreira ◽  
B. F. Zhu ◽  
G. Bastard ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Cascade Laser ◽  
Optical Phonon ◽  
Phonon Scattering ◽  
Quantum Cascade ◽  
Optical Phonon Scattering

3.4-THz quantum cascade laser based on longitudinal-optical-phonon scattering for depopulation

2003 ◽  
Vol 82 (7) ◽  
pp. 1015-1017 ◽  
Author(s):  
Benjamin S. Williams ◽  
Hans Callebaut ◽  
Sushil Kumar ◽  
Qing Hu ◽  
John L. Reno
Keyword(s):  
Quantum Cascade Laser ◽  
Optical Phonon ◽  
Phonon Scattering ◽  
Longitudinal Optical ◽  
Longitudinal Optical Phonon ◽  
Quantum Cascade ◽  
Optical Phonon Scattering

The Temperature Dependence of Optical Phonon Scattering in Graphene under Strong Magnetic Field

2013 ◽  
Vol 82 (9) ◽  
pp. 094606 ◽  
Author(s):  
Zi-Wu Wang ◽  
Lei Liu ◽  
Lin Shi ◽  
Xiao-Jing Gong ◽  
Wei-Ping Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Temperature Dependence ◽  
Strong Magnetic Field ◽  
Optical Phonon ◽  
Phonon Scattering ◽  
Optical Phonon Scattering

Terahertz bound-to-continuum quantum-cascade lasers based on optical-phonon scattering extraction

2005 ◽  
Vol 86 (18) ◽  
pp. 181101 ◽  
Author(s):  
Giacomo Scalari ◽  
Nicolas Hoyler ◽  
Marcella Giovannini ◽  
Jérôme Faist
Keyword(s):  
Optical Phonon ◽  
Phonon Scattering ◽  
Quantum Cascade Lasers ◽  
Quantum Cascade ◽  
Optical Phonon Scattering ◽  
Cascade Lasers

scholarly journals Influence of Confined Phonons on the Hall Coefficient in a Cylindrycal Quantum wire with an infinite potential (for electron – confined optical phonon scattering)

2019 ◽  
Vol 35 (3) ◽  
Author(s):  
Pham Ngoc Thang ◽  
Le Thai Hung ◽  
Do Tuan Long ◽  
Nguyen Quang Bau
Keyword(s):  
Magnetic Field ◽  
Hall Coefficient ◽  
Optical Phonon ◽  
Quantum Wire ◽  
Phonon Scattering ◽  
Constant Electric Field ◽  
Optical Phonons ◽  
Phonon Confinement ◽  
Optical Phonon Scattering ◽  
Analytical Expressions

The influence of confined optical phonons on the Hall Coefficient (HC) in a Cylindrycal Quantum Wire (CQW) with an infinite potential (for electron – confined optical phonons scattering). Consider a case where CQW is placed in a perpendicular magnetic field , a constant - electric field  and an intense electromagnetic wave . By using the quantum kinetic equation for electrons interacting with Confined Optical Phonon (COP), we obtain analytical expressions for (HC), which are different from in comparison to those obtained for the HC in the case of normal bulk semiconductor and in the case of cylindrycal quantum wire with electron – unconfined phonons scattering mechanism. Numerical calculations are also applied for AlGaAs/GaAs/AlGaAs cylindrycal quantum wire, we see the HC depends on magnetic field B, temperature T, frequency Ω and amplitude E0 of laser radiation and especially quantum index m1 and m2 characterizing the phonon confinement. This influence is due to the quantum index m1 and m2, which makes an increase of Hall coefficient by 2,3 times in comparition with the case of unconfined phonons. When the quantum number m1 and m2 goes to zero, the result is the same as in the case of unconfined phonons.

Control of Optical Gain in the Active Region of Quantum Cascade Laser by Strong Perpendicular Magnetic Field

2005 ◽  
Vol 494 ◽  
pp. 31-36 ◽  
Author(s):  
J. Radovanović ◽  
V. Milanović ◽  
Z. Ikonić ◽  
D. Indjin
Keyword(s):  
Magnetic Field ◽  
Active Region ◽  
Quantum Cascade Laser ◽  
Phonon Scattering ◽  
Optical Gain ◽  
Landau Levels ◽  
Quantum Cascade ◽  
Emit Radiation ◽  
Electron Dispersion ◽  
The Magnetic Field

The optical gain in the active region of quantum cascade laser in an external magnetic field is analyzed. When the magnetic field is applied in the direction perpendicular to the plane of the layers, electron dispersion is broken into series of discrete Landau levels. This additional confinement strongly modifies the lifetime of electrons in the upper state of the laser transition, which is controlled by electron-phonon scattering. Landau levels are magnetically tuneable and, depending on their configuration, phonon emission is either inhibited or resonantly enhanced. This translates into a strong modulation of the population inversion, and consequently of the optical gain by varying the magnetic field. Numerical results are presented for a structure previously considered by Smirnov et al. [Phys. Rev B 66 (2002) 125317] which is designed to emit radiation at λ~11.4µm, with the magnetic field varied in the range 10-60T. The effects of band nonparabolicity are taken into account in this model.

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

2019 ◽  
Vol 35 (4) ◽  
Author(s):  
Tran Hai Hung ◽  
Nguyen Quang Bau ◽  
Doan Minh Quang
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Wave ◽  
Optical Phonon ◽  
Quantum Wire ◽  
Phonon Scattering ◽  
Thermoelectric Effects ◽  
Optical Phonon Scattering ◽  
Study Results ◽  
The Difference ◽  
The Magnetic Field

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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