Asymmetric quantum-confined Stark effects of hierarchical self-assembly of GaAs/AlxGa1-xAs quantum dots

Shu-Shen Li; Jian-Bai Xia
July 2005
Applied Physics Letters;7/25/2005, Vol. 87 Issue 4, p043102
Academic Journal
Quantum-confined Stark effects in GaAs/AlxGa1-xAs self-assembled quantum dots are investigated theoretically in the framework of effective-mass envelope function theory. The electron and hole energy levels and optical transition energies are calculated in the presence of an electric field in different directions. In our calculation, the effect of finite offset, valence-band mixing, the effects due to the different effective masses of electrons and holes in different regions, and the real quantum dot structures are all taken into account. The results show that the electron and hole energy levels and the optical transition energies can cause blueshifts when the electric field is applied along the opposite to the growth direction. Our calculated results are useful for the application of hierarchical self-assembly of GaAs/AlxGa1-xAs quantum dots to photoelectric devices.


Related Articles

  • Relation between Theories, Experiments, and Simulations of Spectral Line Shapes. Oks, Eugene // International Journal of Spectroscopy;2010, p1 

    Simulations of Shapes and Shifts of Spectral Lines (SSSL) are important as the third powerful research methodology-in addition to theories and experiments. However, there is a growing tendency in physics in general and in the area of SSSL in particular, to consider the ultimate test of any...

  • Stark effect of symmetric-top rotational levels. Andreev, S.; Makarov, V. // Radiophysics & Quantum Electronics;Sep2008, Vol. 51 Issue 9, p718 

    The method developed for a rotator in [1] is used for an analytical study of the Stark effect of symmetric-top rotational levels in the strong-field limit.

  • Experimental Stark Widths and Shifts for Spectral Lines of Neutral and Ionized Atoms. Lesage, A. // AIP Conference Proceedings;10/22/2008, Vol. 1058 Issue 1, p357 

    The article presents a critical review of the available experimental data on Stark widths and shifts for spectral lines of non-hydrogenic neutral atoms and positive ions. It covers the period from 2001 through the end of 2007 and represents a continuation of earlier critical reviews up to 2000....

  • Zeeman-Stark Profiles of Low-n Hydrogen Lines in Near Impact Regime. Rosato, J.; Capes, H.; Ferri, S.; Godbert-Mouret, L.; Koubiti, M.; Marandet, Y.; Stamm, R. // AIP Conference Proceedings;10/22/2008, Vol. 1058 Issue 1, p213 

    Calculations of hydrogen Zeeman-Stark line profiles are presented and discussed when the conditions for impact ion broadening are almost satisfied.

  • Stark spectroscopy of high-lying odd parity levels in atomic samarium. Kondo, T.; Angom, D.; Endo, I.; Fukumi, A.; Horiguchi, T.; Iinuma, M.; Takahashi, T. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Aug2003, Vol. 25 Issue 2, p103 

    We have performed a series of experiments to observe 11 Stark-induced E1 transitions from the 15650.55 cm-1 level to higher levels with odd parity in samarium (Sm) with optical double-resonance technique. Five Stark-induced E1 transition to the 28233.08, 28613.22, 28913.97, 29041.31 and 29130.03...

  • Stark Effect in Charge—Dyon System. Mardoyan, L. G.; Nersessian, A. P.; Petrosyan, M. G. // Theoretical & Mathematical Physics;Jul2004, Vol. 140 Issue 1, p958 

    We consider the linear Stark effect in the MIC–Kepler problem describing the interaction of a charged particle with a Dirac dyon and show that a constant homogeneous electric field completely removes the degeneracy of energy levels with respect to the azimuthal quantum number.

  • Calculation of the Dynamic Stark Effect in the Many-Level Approximation. Koryukina, E. V. // Russian Physics Journal;Nov2003, Vol. 46 Issue 11, p1069 

    A new method for calculating the dynamic Stark effect in a circular polarized electric field of arbitrary strength and frequency is proposed. The basic equations of the method are given. By way of illustration the results of calculation of the shift and splitting of energy levels of a He atom in...

  • Investigation of the Mechanisms for Stark Broadening and Shift of the Spectral Lines in a Nonideal Plasma. Denisov, O. B.; Orlov, N. Yu.; Fortov, V. E.; Kulish, M. I.; Gryaznov, V. K.; Mintsev, V. B. // Plasma Physics Reports;Oct2004, Vol. 30 Issue 10, p878 

    A method for calculating the Stark broadening and shift of the spectral lines was developed based on a combination of the ion plasma model and new theoretical and computational methods for taking the Stark effect into account. Theoretical results are compared with experimental data on the...

  • Hydrogen Stark Broadened Brackett lines. Stehlé, C.; Fouquet, S. // International Journal of Spectroscopy;2010, p1 

    Stark-broadened lines of the hydrogen Brackett series are computed for the conditions of stellar atmospheres and circumstellar envelopes. The computation is performed within the Model Microfield Method, which includes the ion dynamic effects and makes the bridge between the impact limit at low...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics