Field-induced Coulomb coupling in semiconductor macroatoms: Application to single-electron quantum devices

D’Amico, Irene; Rossi, Fausto
September 2001
Applied Physics Letters;9/10/2001, Vol. 79 Issue 11
Academic Journal
An original approach for the control of exciton–exciton Coulomb coupling in semiconductor macroatoms/molecules is proposed. We show that by applying properly tailored external fields, we can induce—or significantly reinforce—excitonic dipoles, which in turn allows one to control and magnify intra- as well as interdot few-exciton effects. Such a dipole–dipole interaction mechanism will be accounted for within a simple analytical model, which is found to be in good agreement with fully three-dimensional calculations. The proposed approach may play an important role for the design and realization of fully optical quantum gates as well as ultrafast optical switches. © 2001 American Institute of Physics.


Related Articles

  • Radiative recombination lifetime of excitons in thin quantum boxes. Gotoh, Hideki; Ando, Hiroaki; Takagahara, Toshihide // Journal of Applied Physics;2/15/1997, Vol. 81 Issue 4, p1785 

    Exciton radiative recombination lifetime in a thin quantum box in the intermediate spatial dimension between the two-dimension and the zero-dimension is investigated by a theoretical analysis which rigorously treats the electron-hole Coulomb interaction. The higher exciton states as well as the...

  • Calculation of excitonic properties of conjugated polymers using the Bethe-Salpeter equation. van der Horst, J.-W.; Bobbert, P. A.; Michels, M. A. J.; Ba¨ssler, H. // Journal of Chemical Physics;4/15/2001, Vol. 114 Issue 15 

    The excitonic spectra of a number of conjugated polymers, polythiophene (PT), polyphenylenevinylene (PPV), ladder-type poly-para-phenylene (LPPP), trans-polyacetylene (PA), and polydiacetylene (PDA), are calculated by solving the Bethe-Salpeter equation for the two-body Green function of the...

  • Excitons: Nanotube answer. Horiuchi, Noriaki // Nature Photonics;Apr2012, Vol. 6 Issue 4, p212 

    The article focuses on the prevention of formation of an exciton in metals through free electron's screening of Coulomb excitation.

  • Combined influence of Coulomb, exchange and phonon couplings on the line shape of quantum dot spectra. Krügel, A.; Axt, V. M.; Kuhn, T.; Vagov, A. // AIP Conference Proceedings;2007, Vol. 893 Issue 1, p989 

    We study single quantum dot (QD) four wave mixing (FWM) and pump probe (PP) spectra calculated numerically from the exact analytical solution for a four level QD model with pure dephasing. Due to Coulomb and exchange interaction the spectra exhibit a fine structure splitting of the exciton and...

  • Pressure Dependence of Exciton Binding Energy in GaN/AlxGa1-xN Quantum Wells. Bardyszewski, W.; Łepkowski, S. P.; Teisseyre, H. // Acta Physica Polonica, A.;May2011, Vol. 119 Issue 5, p663 

    We present a theoretical study of excitons in GaN/AlxGa1-xN wurtzite (0001) quantum wells subjected to hydrostatic pressure. Our results show that the combined effect of pressure induced changes in band structure and piezoelectric field leads to reduction of the exciton binding energy. This...

  • Perspectives of Using ZnO/Zn1-xMnxO Quantum Wells. Tchelidze, T.; Chikoidze, E.; Kvinikadze, Z.; Dumont, Y. // AIP Conference Proceedings;2007, Vol. 899 Issue 1, p663 

    In order to estimate the perspectives of using ZnO/Zn1-xMnxO quantum wells for increasing Curie temperature in this staucture we investigate excitons in ZnO/Zn1-xMnxO quantum wells. The existence of week built-in electric field is investigated. Electric field and Coulomb interaction is accounted...

  • Exciton effects in armchair graphene nanoribbons. Jia, Y.; Geng, X.; Sun, H.; Luo, Y. // European Physical Journal B -- Condensed Matter;Oct2011, Vol. 83 Issue 4, p451 

    We have studied the exciton effects in armchair graphene nanoribbons systematically, using the nonorthogonal tight-binding model supplement by the long-range Coulomb interactions. It is found from our calculations that the excitation energies, the exciton binding energies and the exciton wave...

  • Exciton States in Semiconductor Spherical Nanostructures. Pokutnyi, S. I. // Semiconductors;Sep2005, Vol. 39 Issue 9, p1066 

    The results of theoretical studies of the energy spectra of excitons moving in semiconductor spherical quantum dots are described. The contributions of the kinetic electron and hole energies, the energy of the Coulomb interaction between an electron and hole, and the energy of the polarization...

  • Excitonic Phase Transition in the Extended Three-Dimensional Falicov-Kimball Model. Apinyan, V.; Kopeć, T. // Journal of Low Temperature Physics;Jul2014, Vol. 176 Issue 1/2, p27 

    We study the excitonic phase transition in a system of the conduction band electrons and valence band holes described by the three-dimensional (3D) extended Falicov-Kimball (EFKM) model with the tunable Coulomb interaction $$U$$ between both species. By lowering the temperature, the...


Read the Article


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

Try another library?
Sign out of this library

Other Topics