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Oscillator strengths for 2 ~2S-n^2P transitions of the lithium isoelectronic sequence from Z=11 to 20 被引量:2
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作者 胡木宏 王治文 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第6期2244-2249,共6页
The dipole-length, dipole-velocity and dipole-acceleration absorption oscillator strengths for the 1s^22s-1s^2np (3 ≤ n ≤9) transitions of lithium-like systems from Z = 11 to 20 are calculated by using the energie... The dipole-length, dipole-velocity and dipole-acceleration absorption oscillator strengths for the 1s^22s-1s^2np (3 ≤ n ≤9) transitions of lithium-like systems from Z = 11 to 20 are calculated by using the energies and the multiconfiguration interaction wave functions obtained from a full core plus correlation method, in which relativistic and mass-polarization effects on the energy, as the first-order perturbation corrections, are included. The results of three forms are in good agreement with each other, and closely agree with the experimental data available in the literature. Based on the quantum defects obtained with quantum defect theory (QDT), the discrete oscillator strengths for the transitions from the ground state to highly excited states 1s^2np (n ≥ 10) and oscillator strength densities corresponding to the bound-free transitions are obtained for these ions. 展开更多
关键词 lithium isoelectronic sequence oscillator strengths quantum defect
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Effect of Electron Correlation and Breit Interaction on Energies, Oscillator Strengths, and Transition Rates for Low-Lying States of Helium
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作者 Qing Liu Jiguang Li +1 位作者 Jianguo Wang Yizhi Qu 《Chinese Physics Letters》 SCIE CAS CSCD 2021年第11期23-29,共7页
The transition energies, E1 transitional oscillator strengths of the spin-allowed as well as the spin-forbidden and the corresponding transition rates, and complete M1, E2, M2 forbidden transition rates for 1s^(2), 1s... The transition energies, E1 transitional oscillator strengths of the spin-allowed as well as the spin-forbidden and the corresponding transition rates, and complete M1, E2, M2 forbidden transition rates for 1s^(2), 1s2s, and 1s2p states of He I, are investigated using the multi-configuration Dirac–Hartree–Fock method. In the subsequent relativistic configuration interaction computations, the Breit interaction and the QED effect are considered as perturbation, separately. Our transition energies, oscillator strengths, and transition rates are in good agreement with the experimental and other theoretical results. As a result, the QED effect is not important for helium atoms, however, the effect of the Breit interaction plays a significant role in the transition energies, the oscillator strengths and transition rates. 展开更多
关键词 QED DIRAC oscillator strengths and Transition Rates for Low-Lying States of Helium Effect of Electron Correlation and Breit Interaction on Energies
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Oscillator Strengths for 2s~2-2p~2P Transitions of the Lithium IsoelectronicSequence from NaIX to CaXVIII
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作者 CHENChao WANGZhi-Wen 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第2期305-308,共4页
The nonrelativistic dipole-length, -velocity and -acceleration absorptionoscillator strengths for the 1s~22s-1s~22p transitions of the lithium isoelectronic sequence from Z= 11 to 20 are calculated by using the energi... The nonrelativistic dipole-length, -velocity and -acceleration absorptionoscillator strengths for the 1s~22s-1s~22p transitions of the lithium isoelectronic sequence from Z= 11 to 20 are calculated by using the energies and the multiconfiguration interaction wavefunctions obtained from a full core plus correlation (FCPC) method. In most cases, the agreementbetween the oscillator strengths values from the length and velocity formula is up to four or fivedigit. Our results are aiso in good agreement with previous theoretical data available in theliterature. 展开更多
关键词 oscillator strengths lithium isoelectronic sequence full core pluscorrelation method
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Spectroscopy and scattering matrices with nitrogen atom:Rydberg states and optical oscillator strengths
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作者 Yuhao Zhu Rui Jin +1 位作者 Yong Wu Jianguo Wang 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第4期261-266,共6页
The scattering matrices of e+N^(+)with J^(π)=1.5^(+)in discrete energy regions are calculated using the eigenchannel R-matrix method.We obtain good parameters of multichannel quantum defect theory(MQDT)that vary smoo... The scattering matrices of e+N^(+)with J^(π)=1.5^(+)in discrete energy regions are calculated using the eigenchannel R-matrix method.We obtain good parameters of multichannel quantum defect theory(MQDT)that vary smoothly as the function of the energy resulting from the analytical continuation property of the scattering matrices.By employing the MQDT,all discrete energy levels for N could be calculated accurately without missing anyone.The MQDT parameters(i.e.,scattering matrices)can be calibrated with the available precise spectroscopy values.In this work,the optical oscillator strengths for the transition between the ground state and Rydberg series are obtained,which provide rich data for the diagnostic analysis of plasma. 展开更多
关键词 eigenchannel R-matrix oscillator strengths
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Oscillator Strengths and Lifetimes for the P XIII Spectrum
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作者 A. J. Mania F. R. T. Luna 《Spectral Analysis Review》 2016年第1期1-10,共10页
The P XIII spectrum has been analyzed by several authors using different light sources. The semi-empirical oscillator strengths (gf) and the lifetimes presented in this work for all known P XIII spectral lines and ene... The P XIII spectrum has been analyzed by several authors using different light sources. The semi-empirical oscillator strengths (gf) and the lifetimes presented in this work for all known P XIII spectral lines and energy levels were carried out in a multi-configuration Hartree-Fock relativistic (HFR) approach. In this calculation, the electrostatic parameters were optimized by a least-squares procedure in order to improve the adjustment of theoretical to experimental energy levels. The method produces gf-values that are in agreement with intensity observations and lifetime values closer to the experimental ones. 展开更多
关键词 P XIII Spectrum Atomic Transitions Energy Levels oscillator strengths LIFETIMES
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Generalized oscillator strengths for some higher valence-shell excitations of krypton atom
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作者 朱林繁 张放心 +5 位作者 成华东 袁慧 苑震生 李文斌 刘小井 徐克尊 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第10期2938-2945,共8页
The valence-shell excitations of krypton atom have been investigated by fast electron impact with an angle-resolved electron-energy-loss spectrometer. The generalized oscillator strengths for some higher mixed valence... The valence-shell excitations of krypton atom have been investigated by fast electron impact with an angle-resolved electron-energy-loss spectrometer. The generalized oscillator strengths for some higher mixed valence-shell excitations in 4d, 4f, 5p, 5d, 6s, 6p, 7s ←4p of krypton atom have been determined. Their profiles are discussed, and the generalized oscillator strengths for the electric monopole and quadrupole excitations in 5p ← 4p are compared with the calculations of Amusia et al. (Phys. Rev. A 67 022703 (2003)). The differences between the experimental results and theoretical calculations show that more studies are needed. 展开更多
关键词 generalized oscillator strength electric multipolarity KRYPTON
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Effect of Different Ligand Field Strengths on the Oscillator Strengths of Lanthanide Ions
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作者 武登国 孙元洪 李国柱 《Journal of Rare Earths》 SCIE EI CAS CSCD 1998年第1期6-10,共5页
The oscillator strengths of the absorption spectra for rare earth complexes in different solvents were determined and calculated on the basis of the JuddOfelt theory. The effect of different ligand field strengths on ... The oscillator strengths of the absorption spectra for rare earth complexes in different solvents were determined and calculated on the basis of the JuddOfelt theory. The effect of different ligand field strengths on the oscillator strengths of lanthanide ions is discussed. In plotting the oscillator strengths of the hypersensitive transition of Ho3+, Er3+ against those of Nd3+, the reverse extending lines of the straight lines were found to intersect at a point on the whole. The coordinates of the crosspoint are believed to represent the strength value of the smallest coordinated effect. 展开更多
关键词 Rare earths Rare earth complexes Hypersensitive transitions oscillator strength
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Oscillator strength and cross section study of the valence-shell excitations of NO_(2) by fast electron scattering
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作者 孙强 陈锦峰 +2 位作者 聂智伟 朱剑辉 朱林繁 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第11期201-206,共6页
Oscillator strengths and cross sections of the valence-shell excitations in NO_(2)are of great significance in testing the theoretical calculations and monitoring the state of the ozone layer in the earth’s atmospher... Oscillator strengths and cross sections of the valence-shell excitations in NO_(2)are of great significance in testing the theoretical calculations and monitoring the state of the ozone layer in the earth’s atmosphere. In the present work, the generalized oscillator strengths of the valence-shell excitations in NO_(2)were obtained based on the fast electron scattering technique at an incident electron energy of 1.5 ke V and an energy resolution of about 70 me V. By extrapolating the generalized oscillator strengths to the limit of a zero squared momentum transfer, the optical oscillator strengths for the dipole-allowed transitions have been obtained, which provide an independent cross check to the previous experimental results. Based on the BE-scaling method, the corresponding integral cross sections have also been derived systematically from the excitation threshold to 5000 eV. The present dynamic parameters can provide the fundamental spectroscopic data of NO_(2)and have important applications in the studies of atmospheric science. The datasets presented in this paper, including the GOSs, OOSs and ICSs, are openly available at https://doi.org/10.57760/sciencedb.j00113.00156. 展开更多
关键词 nitrogen dioxide oscillator strength integral cross section electron scattering
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Dipole and generalized oscillator strength derived electronic properties of an endohedral hydrogen atom embedded in a Debye-Huckel plasma 被引量:1
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作者 C.Martínez-Flores R.Cabrera-Trujillo 《Matter and Radiation at Extremes》 SCIE EI CAS 2018年第5期227-242,共16页
We report electronic properties of a hydrogen atom encaged by an endohedral cavity under the influence of a weak plasma interaction. Weimplement a finite-difference approach to solve the Schrodinger equation for a hyd... We report electronic properties of a hydrogen atom encaged by an endohedral cavity under the influence of a weak plasma interaction. Weimplement a finite-difference approach to solve the Schrodinger equation for a hydrogen atom embedded in an endohedral cavity modeled by theWoods-Saxon potential with well depth V0, inner radius R0, thickness D, and smooth parameter g. The plasma interaction is described by aDebye-Hu¨ckel screening potential that characterizes the plasma in terms of a Debye screening length lD. The electronic properties of theendohedral hydrogen atom are reported for selected endohedral cavity well depths, V0, and screening lengths, lD, that emulate differentconfinement and plasma conditions. We find that for low screening lengths, the endohedral cavity potential dominates over the plasma interaction by confining the electron within the cavity. For large screening lengths, a competition between both interactions is observed. We assessand report the photo-ionization cross section, dipole polarizability, mean excitation energy, and electronic stopping cross section as function of lD and V0. We find a decrease of the Generalized Oscillator Strength (GOS) when the final excitation is to an s state as the plasma screeninglength decreases. For a final excitation into a p state, we find an increase in the GOS as the endohedral cavity well-depth increases. For the caseof the electronic stopping cross section, we find that the plasma screening and endohedral cavity effects are larger in the low-to-intermediateprojectile energies for all potential well depths considered. Our results agree well to available theoretical and experimental data and are afirst step towards the understanding of dipole and generalized oscillator strength dependent properties of an atom in extreme conditions encagedby an endohedral cavity immersed in a plasma medium. 展开更多
关键词 oscillator strengths Debye-Huckel plasma CAVITIES Endohedral Energy loss Stopping power
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Vibronic effect study of ^(1)A_(2) state of H_(2)O and D_(2)O
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作者 张倍源 王礼涵 +5 位作者 朱剑辉 徐卫青 马子茹 赵小利 吴勇 朱林繁 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第5期395-399,共5页
The generalized oscillator strengths of the dipole-forbidden excitations of the ^(1)A_(2) of H_(2)O and D_(2)O were calculated with the time dependent density functional theory,by taking into account the vibronic effe... The generalized oscillator strengths of the dipole-forbidden excitations of the ^(1)A_(2) of H_(2)O and D_(2)O were calculated with the time dependent density functional theory,by taking into account the vibronic effect.It is found that the vibronic effect converts the dipole-forbidden excitation of the ^(1)A_(2) into a dipole-allowed one,which enhances the intensities of the corresponding generalized oscillator strength in the small squared momentum transfer region.The present investigation shows that the vibronic effect of H_(2)O is slightly stronger than that of D_(2)O,which exhibits a clear isotopic effect. 展开更多
关键词 WATER heavy water generalized oscillator strength vibronic effect isotope effect
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The nonrelativistic oscillator strength of a hyperbolic-type potential
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作者 H.Hassanabadi S.Zarrinkamar B.H.Yazarloo 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第6期105-109,共5页
We consider the D-dimensional SchrSdinger equation under the hyperbolic potential V0(1 -coth(ar))+ 171 (1 - coth(ar))2. Using a Pekeris-type approximation, the approximate analytical solutions of the problem ... We consider the D-dimensional SchrSdinger equation under the hyperbolic potential V0(1 -coth(ar))+ 171 (1 - coth(ar))2. Using a Pekeris-type approximation, the approximate analytical solutions of the problem are obtained via the supersymmetric quantum mechanics. The behaviors of energy eigenvalues versus dimension are discussed for various quantum numbers. Useful expectation values as well as the oscillator strength are obtained. 展开更多
关键词 Schroedinger equation D-dimensional space hyperbolic potential supersymmetry quantum me-chanics oscillator strength
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Relativistic calculations of 3s^2 ~1S_0-3s3p ~1P_1 and 3s^2 ~1S_0-3s3p ~3P_(1,2) transition probabilities in the Mg isoelectronic sequence 被引量:1
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作者 程诚 高翔 +2 位作者 青波 张小乐 李家明 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第3期150-156,共7页
Using the multi-configuration Dirac-Fock self-consistent field method and the relativistic configuration-interaction method, calculations of transition energies, oscillator strengths and rates are performed for the 3s... Using the multi-configuration Dirac-Fock self-consistent field method and the relativistic configuration-interaction method, calculations of transition energies, oscillator strengths and rates are performed for the 3s2 1S0-3s3p 1P1 spinallowed transition, 3s2 1S0-3s3p 3P1,2 intercombination and magnetic quadrupole transition in the Mg isoelectronic sequence (Mg I, A1 II, Si III, P IV and S V). Electron correlations are treated adequately, including intravalence electron correlations. The influence of the Breit interaction on oscillator strengths and transition energies are investigated. Quantum eleetrodynamics corrections are added as corrections. The calculation results are found to be in good agreement with the experimental data and other theoretical calculations. 展开更多
关键词 transition energies oscillator strengths relativistic calculation Breit interactions
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Energies and Transition Rates of Low-Lying Excited States for Beryllium
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作者 韩利红 苟秉聪 王菲 《Journal of Beijing Institute of Technology》 EI CAS 2002年第1期109-112,共4页
Low lying excited states of beryllium are calculated with multiconfiguration interaction method. The relativisitic corrections and mass polarization are included. The oscillator strength and radiation rates are also ... Low lying excited states of beryllium are calculated with multiconfiguration interaction method. The relativisitic corrections and mass polarization are included. The oscillator strength and radiation rates are also calculated. Our results are in good agreement with other theoretical data. 展开更多
关键词 oscillator strength radiation transition BERYLLIUM
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Recent Progress in Radiative-Rate Determination of Some Heavy Ions (Xe<sup>9+</sup>, Xe<sup>10+</sup>, Lu<sup>3+</sup>, Hf<sup>4+</sup>, Ta<sup>5+</sup>) of Interest in Fusion
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作者 Saturnin Enzonga Yoca 《Journal of Applied Mathematics and Physics》 2021年第11期2848-2888,共41页
This paper presents a review about the radiative properties (transition probabilities and oscillator strengths) of two xenon ions (Xe<sup>9+</sup>, Xe<sup>10+</sup>) and three members of Er I i... This paper presents a review about the radiative properties (transition probabilities and oscillator strengths) of two xenon ions (Xe<sup>9+</sup>, Xe<sup>10+</sup>) and three members of Er I isoelectronic sequence (Lu<sup>3+</sup>, Hf<sup>4+</sup>, Ta<sup>5+</sup>) of interest in controlled thermonuclear fusion, including our recent theoretical data obtained using two independent theoretical atomic structure computational approaches (semi-empirical Hartree-Fock with relativistic corrections method (HFR) and the <em>ab initio</em> multiconfiguration Dirac-Hartree-Fock (MCDHF)). The tables, from the second one, summarize the recommended data expected to be useful for plasma modelling in fusion. 展开更多
关键词 Atomic Spectra Atomic Data Transition Probabilities oscillator strengths Heavy Elements
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Study on F-F Transitions of Powdered Neodymium Compounds by Photoacoustic Spectroscopy 被引量:5
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作者 杨跃涛 苏庆德 +1 位作者 赵贵文 张淑仪 《Journal of Rare Earths》 SCIE EI CAS CSCD 2002年第1期10-14,共5页
Photoacoustic (PA) spectra of powdered neodymium oxide (Nd 2O 3 (A type)), neodymium hydrated chloride (NdCl 3·6H 2O) and neodymium fluoride (NdF 3) were reported. PA band shifts as compared to their positio... Photoacoustic (PA) spectra of powdered neodymium oxide (Nd 2O 3 (A type)), neodymium hydrated chloride (NdCl 3·6H 2O) and neodymium fluoride (NdF 3) were reported. PA band shifts as compared to their positions in aqueous Nd 3+ are used to calculate the nephelauxetic parameters of the compounds. The variation of these parameters and correlation with the nature of metal ligand bonding were discussed. A novel method is introduced to determine the relative values of oscillator strengths and Judd Ofelt parameters of powdered samples using PA spectroscopy. It is found that a linear correlation exists between relative values of τ 2 and oscillator strengths of hypersensitive transitions of the title compounds. It is hopetul that the new method of PA technique may serve for the Judd Ofelt quantitative analysis of powdered rare earth compounds. 展开更多
关键词 rare earths photoacoustic spectroscopy NEODYMIUM f f transition oscillator strength
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Dependence of Optical Absorption in Silicon Nanostructures on Size of Silicon Nanoparticles
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作者 丁文革 苑静 +3 位作者 孟令海 武树杰 于威 傅广生 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第4期688-692,共5页
The amorphous silicon nanoparticles (Si NPs) embedded in silicon nitride (SiNx) films prepared by helicon wave plasma-enhanced chemical vapor deposition (HWP-CVD) technique are studied. From Raman scattering inv... The amorphous silicon nanoparticles (Si NPs) embedded in silicon nitride (SiNx) films prepared by helicon wave plasma-enhanced chemical vapor deposition (HWP-CVD) technique are studied. From Raman scattering investigation, we determine that the deposited film has the structure of silicon nanocrystals embedded in silicon nitride (nc-Si/SiNx) thin film at a certain hydrogen dilution amount. The analysis of optical absorption spectra implies that the Si NPs is affected by quantum size effects and has the nature of an indirect-band-gap semiconductor. Further, considering the effects of the mean Si NP size and their dispersion on oscillator strength, and quantum-confinement, we obtain an analytical expression for the spectral absorbance of ensemble samples. Gaussian as well as lognormal size-distributions of the Si NPs are considered for optical absorption coefficient calculations. The influence of the particle size-distribution on the optical absorption spectra was systematically studied. We present the fitting of the optical absorption experimental data with our model and discuss the results. 展开更多
关键词 optical absorption silicon nanoparticles quantum size effects oscillator strength silicon nitride film
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Strain effects on the polarized optical properties of InGaN with different In compositions
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作者 陶仁春 于彤军 +3 位作者 贾传宇 陈志忠 秦志新 张国义 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第6期2603-2609,共7页
Strain effects on the polarized optical properties of c-plane and m-plane InxGa1-xN were discussed for different In compositions (x = 0, 0.05, 0.10, 0.15) by analyzing the relative oscillator strength (ROS) and en... Strain effects on the polarized optical properties of c-plane and m-plane InxGa1-xN were discussed for different In compositions (x = 0, 0.05, 0.10, 0.15) by analyzing the relative oscillator strength (ROS) and energy level splitting of the three transitions related to the top three valence bands (VBs). The ROS was calculated by applying the effective-mass Hamiltonian based on k .p perturbation theory. For c-plane InxGa1-xN, it was found that the ROS of 〈X〉 and 〈Y〉-like states were superposed with each other. Especially, under compressive strain, they dominated in the top VB whose energy level also went up with strain, while the ROS of the |Z〉-like state decreased in the second band. For m-plane InxGa1-xN under compressive strain, the top three VBs were dominated by 〈X〉, 〈Z〉, and 〈Y〉-like states, respectively, which led to nearly linearly-polarized light emissions. For the top VB, ROS difference between [X) and [Z)-like states became larger with compressive strain. It was also found that such tendencies were more evident in layers with higher In compositions. As a result, there would be more TE modes in total emissions from both c-plane and m-plane InGaN with compressive strain and In content, leading to a larger polarization degree. Experimental results of luminescence from InGaN/GaN quantum wells (QWs) showed good coincidence with our calculations. 展开更多
关键词 GaN polarization degree M-PLANE relative oscillator strength
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Superexcited states of carbon monoxide studied by fast-electron impact
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作者 范岚岚 钟志萍 +4 位作者 朱林繁 刘小井 成华东 苑震生 徐克尊 《Chinese Physics B》 SCIE EI CAS CSCD 2005年第12期2478-2483,共6页
Absolute optical oscillator strength density and double differential cross section spectra of CO below 120 eV are determined by fast electron impact. Some peaks above the first ionization threshold stand out as the mo... Absolute optical oscillator strength density and double differential cross section spectra of CO below 120 eV are determined by fast electron impact. Some peaks above the first ionization threshold stand out as the momentum transfer square K2 increases. The doubly excited Rydberg states converging to C 2∑^+, D ^2∏, and F ^2∏ states of CO^+, respectively, are confirmed in our spectra. Another peak at around 32eV is assigned to the transition of (3σ)^-1(2π)^1^1∏←X^1∑^+. 展开更多
关键词 oscillator strength superexcited state energy loss CO
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The nonlinear optical properties of a magneto-exciton in a strained Ga_(0.2)In_(0.8)As/GaAs quantum dot
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作者 N.R.Senthil Kumar A.John Peter Chang Kyoo Yoo 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第10期479-485,共7页
The magnetic field-dependent heavy hole excitonic states in a strained Gao.2Ino.sAs/GaAs quantum dot are investi- gated by taking into account the anisotropy, non-parabolicity of the conduction band, and the geometric... The magnetic field-dependent heavy hole excitonic states in a strained Gao.2Ino.sAs/GaAs quantum dot are investi- gated by taking into account the anisotropy, non-parabolicity of the conduction band, and the geometrical confinement. The strained quantum dot is considered as a parabolic dot of InAs embedded in a GaAs barrier material. The dependence of the effective excitonic g-factor as a function of dot radius and the magnetic field strength is numerically measured. The interband optical transition energy as a function of geometrical confinement is computed in the presence of a mag- netic field. The magnetic field-dependent oscillator strength of interband transition under the geometrical confinement is studied. The exchange enhancements as a function of dot radius are observed for various magnetic field strengths in a strained Gao.2Ino.sAs/GaAs quantum dot. Heavy hole excitonic absorption spectra, the changes in refractive index, and the third-order susceptibility of third-order harmonic generation are investigated in the Gao.2Ino.8As/GaAs quantum dot. The result shows that the effect of magnetic field strength is more strongly dependent on the nonlinear optical property in a low-dimensional semiconductor system. 展开更多
关键词 oscillator strength EXCITON quantum dot
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Radiative life time of an exciton confined in a strained GaN/Ga_(1-x)Al_xN cylindrical dot:built-in electric field effects
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作者 Chang Woo Lee A.John Peter 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第7期367-372,共6页
The binding energy of an exciton in a wurtzite GaN/GaAlN strained cylindrical quantum dot is investigated theoretically. The strong built-in electric field due to the spontaneous and piezoelectric polarizations of a G... The binding energy of an exciton in a wurtzite GaN/GaAlN strained cylindrical quantum dot is investigated theoretically. The strong built-in electric field due to the spontaneous and piezoelectric polarizations of a GaN/GaAlN quantum dot is included. Numerical calculations are performed using a variational procedure within the single band effective mass approximation. Valence-band anisotropy is included in our theoretical model by using different hole masses in different spatial directions. The exciton oscillator strength and the exciton lifetime for radiative recombination each as a function of dot radius have been computed. The result elucidates that the strong built-in electric field influences the oscillator strength and the recombination life time of the exciton. It is observed that the ground state exciton binding energy and the interband emission energy increase when the cylindrical quantum dot height or radius is decreased, and that the exciton binding energy, the oscillator strength and the radiative lifetime each as a function of structural parameters (height and radius) sensitively depend on the strong built-in electric field. The obtained results are useful for the design of some opto-photoelectronic devices. 展开更多
关键词 quantum dot donor bound excitons oscillator strength
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