The Experts below are selected from a list of 252 Experts worldwide ranked by ideXlab platform
Tran Cong Phong - One of the best experts on this subject based on the ideXlab platform.
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electron interface phonon scattering in quantum wells due to Absorbtion and emission of interface phonons
Physica E-low-dimensional Systems & Nanostructures, 2020Co-Authors: Ho Kim Dan, Le Dinh, Tran Cong Phong, Hoang Dinh Trien, Nguyen Dinh HienAbstract:Abstract In this article, using the operator projection technique, we will theoretically study the electron-interface phonon scattering process due to the Absorbtion and emission of interface phonons by calculating the expression for the absorption power (AP) in GaAs/AlAs quantum wells (QWs). The full width at half maximum (FWHM) of the magneto-interface phonon resonance peaks was obtained by using the profile method. The FWHM is given as functions of the temperature, well width, and magnetic field presented to compare for both the barrier material AlAs and well material GaAs in the two cases of emission and Absorbtion of interface modes. The result clearly demonstrates important roles of the interface optical modes when the well width is small enough.
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Electron–interface phonon scattering in quantum wells due to Absorbtion and emission of interface phonons
Physica E: Low-dimensional Systems and Nanostructures, 2020Co-Authors: Ho Kim Dan, Le Dinh, Tran Cong Phong, Hoang Dinh Trien, Nguyen Dinh HienAbstract:Abstract In this article, using the operator projection technique, we will theoretically study the electron-interface phonon scattering process due to the Absorbtion and emission of interface phonons by calculating the expression for the absorption power (AP) in GaAs/AlAs quantum wells (QWs). The full width at half maximum (FWHM) of the magneto-interface phonon resonance peaks was obtained by using the profile method. The FWHM is given as functions of the temperature, well width, and magnetic field presented to compare for both the barrier material AlAs and well material GaAs in the two cases of emission and Absorbtion of interface modes. The result clearly demonstrates important roles of the interface optical modes when the well width is small enough.
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lo phonon assisted cyclotron resonance linewidth via multiphoton absorption process in cylindrical quantum wire
Superlattices and Microstructures, 2013Co-Authors: Huynh V Phuc, Le Dinh, Tran Cong PhongAbstract:Abstract Phonon-assisted cyclotron resonance (PACR) in cylindrical quantum wire (CQW) is investigated via multiphoton absorption process when electrons are scattered by LO-phonon. The additional peaks in the absorption spectrum due to transitions between Landau levels accompanied by emission and absorption of LO-phonon are indicated. From curves on graphs of the absorption power, we obtain PACR-linewidth as profiles of the curves by using profile method. The temperature and magnetic field dependence of the absorption power and PACR-linewidth are investigated. The results are compared with those in the monophoton absorption. The calculations demonstrate that the multiphoton absorption process is strong enough to be detected in PACR.
R Z Wang - One of the best experts on this subject based on the ideXlab platform.
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a review for Absorbtion and adsorbtion solar cooling systems in china
Renewable & Sustainable Energy Reviews, 2009Co-Authors: X Q Zhai, R Z WangAbstract:In the past decades, solar water collectors were installed for the main purpose of preheating domestic hot water or to cover a fraction of the space heating demand in China. However, solar cooling systems were constructed just for demonstration purposes. Since the building of the first solar-powered absorption cooling system in Shenzhen in 1987, there have been over 10 additional solar cooling demonstration projects constructed. In this paper, the most representative five projects including both absorption and adsorption cooling systems are introduced and summarized. From the demonstrations, solar absorption cooling systems have been shown to be more suitable for large building air-conditioning systems. Comparatively, solar adsorption cooling systems are more promising for small size air-conditioning systems. In order to attain high utilization ratio, it is highly recommended to design solar-powered integrated energy systems in public buildings. In addition, highly efficient heat pumps are considered as the most appropriate auxiliary heat sources for solar cooling systems, for the purpose of all-weather operation. In the 11th Five year research project (duration 2006-2010), solar cooling technologies will be further investigated to achieve a breaking through in the integration of solar cooling systems with buildings.
Nguyen Dinh Hien - One of the best experts on this subject based on the ideXlab platform.
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electron interface phonon scattering in quantum wells due to Absorbtion and emission of interface phonons
Physica E-low-dimensional Systems & Nanostructures, 2020Co-Authors: Ho Kim Dan, Le Dinh, Tran Cong Phong, Hoang Dinh Trien, Nguyen Dinh HienAbstract:Abstract In this article, using the operator projection technique, we will theoretically study the electron-interface phonon scattering process due to the Absorbtion and emission of interface phonons by calculating the expression for the absorption power (AP) in GaAs/AlAs quantum wells (QWs). The full width at half maximum (FWHM) of the magneto-interface phonon resonance peaks was obtained by using the profile method. The FWHM is given as functions of the temperature, well width, and magnetic field presented to compare for both the barrier material AlAs and well material GaAs in the two cases of emission and Absorbtion of interface modes. The result clearly demonstrates important roles of the interface optical modes when the well width is small enough.
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Electron–interface phonon scattering in quantum wells due to Absorbtion and emission of interface phonons
Physica E: Low-dimensional Systems and Nanostructures, 2020Co-Authors: Ho Kim Dan, Le Dinh, Tran Cong Phong, Hoang Dinh Trien, Nguyen Dinh HienAbstract:Abstract In this article, using the operator projection technique, we will theoretically study the electron-interface phonon scattering process due to the Absorbtion and emission of interface phonons by calculating the expression for the absorption power (AP) in GaAs/AlAs quantum wells (QWs). The full width at half maximum (FWHM) of the magneto-interface phonon resonance peaks was obtained by using the profile method. The FWHM is given as functions of the temperature, well width, and magnetic field presented to compare for both the barrier material AlAs and well material GaAs in the two cases of emission and Absorbtion of interface modes. The result clearly demonstrates important roles of the interface optical modes when the well width is small enough.
Le Dinh - One of the best experts on this subject based on the ideXlab platform.
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electron interface phonon scattering in quantum wells due to Absorbtion and emission of interface phonons
Physica E-low-dimensional Systems & Nanostructures, 2020Co-Authors: Ho Kim Dan, Le Dinh, Tran Cong Phong, Hoang Dinh Trien, Nguyen Dinh HienAbstract:Abstract In this article, using the operator projection technique, we will theoretically study the electron-interface phonon scattering process due to the Absorbtion and emission of interface phonons by calculating the expression for the absorption power (AP) in GaAs/AlAs quantum wells (QWs). The full width at half maximum (FWHM) of the magneto-interface phonon resonance peaks was obtained by using the profile method. The FWHM is given as functions of the temperature, well width, and magnetic field presented to compare for both the barrier material AlAs and well material GaAs in the two cases of emission and Absorbtion of interface modes. The result clearly demonstrates important roles of the interface optical modes when the well width is small enough.
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Electron–interface phonon scattering in quantum wells due to Absorbtion and emission of interface phonons
Physica E: Low-dimensional Systems and Nanostructures, 2020Co-Authors: Ho Kim Dan, Le Dinh, Tran Cong Phong, Hoang Dinh Trien, Nguyen Dinh HienAbstract:Abstract In this article, using the operator projection technique, we will theoretically study the electron-interface phonon scattering process due to the Absorbtion and emission of interface phonons by calculating the expression for the absorption power (AP) in GaAs/AlAs quantum wells (QWs). The full width at half maximum (FWHM) of the magneto-interface phonon resonance peaks was obtained by using the profile method. The FWHM is given as functions of the temperature, well width, and magnetic field presented to compare for both the barrier material AlAs and well material GaAs in the two cases of emission and Absorbtion of interface modes. The result clearly demonstrates important roles of the interface optical modes when the well width is small enough.
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lo phonon assisted cyclotron resonance linewidth via multiphoton absorption process in cylindrical quantum wire
Superlattices and Microstructures, 2013Co-Authors: Huynh V Phuc, Le Dinh, Tran Cong PhongAbstract:Abstract Phonon-assisted cyclotron resonance (PACR) in cylindrical quantum wire (CQW) is investigated via multiphoton absorption process when electrons are scattered by LO-phonon. The additional peaks in the absorption spectrum due to transitions between Landau levels accompanied by emission and absorption of LO-phonon are indicated. From curves on graphs of the absorption power, we obtain PACR-linewidth as profiles of the curves by using profile method. The temperature and magnetic field dependence of the absorption power and PACR-linewidth are investigated. The results are compared with those in the monophoton absorption. The calculations demonstrate that the multiphoton absorption process is strong enough to be detected in PACR.
V. Ramaswamy - One of the best experts on this subject based on the ideXlab platform.
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Solar radiation absorption by CO2, overlap with H2O, and a parameterization for general circulation models
Journal of Geophysical Research: Atmospheres, 1993Co-Authors: S. M. Freidenreich, V. RamaswamyAbstract:The authors report on work done to improve solar radiation Absorbtion calculational results for water vapor and carbon dioxide. These two gases have several Absorbtion lines in the near-infrared, some of which overlap, and are major contributors to atmospheric heating by solar radiation. The line-by-line (LBL) method is the most accurate method of computing Absorbtions by these gases, but is very costly in climate models. Therefore the authors present work on simpler computational formulations, based on LBL calculations. The authors have analyzed the contributions of the major Absorbtion bands of CO[sub 2] and H[sub 2]O to solar heating in the stratosphere and troposphere. They have looked at errors in solar Absorbtion due to CO[sub 2] and H[sub 2]O together, when the individual absorbtivities are averaged over spectral profiles. They have also modifies an Absorbtion formalism for CO[sub 2] which has been used in a number of GCM studies to calculate solar Absorbtion in the atmosphere.
