Semiconductors

, Volume 38, Issue 6, pp 696–701 | Cite as

Spectroscopy of exciton states of InAs quantum molecules

  • V. G. Talalaev
  • J. W. Tomm
  • N. D. Zakharov
  • P. Werner
  • B. V. Novikov
  • G. É. Cirlin
  • Yu. B. Samsonenko
  • A. A. Tonkikh
  • V. A. Egorov
  • N. K. Polyakov
  • V. M. Ustinov
Low-Dimensional Systems

Abstract

Tunnel-coupled pairs of InAs quantum dots (quantum molecules) were formed by molecular beam epitaxy in a GaAs matrix. Optical and structural properties of the obtained quantum molecules were studied. Four molecular exciton states forming a photoluminescence spectrum were revealed. The photoluminescence decay times indicate the possibility of interlevel radiative recombination from the second excited state, which is of particular importance for designing mid-infrared devices.

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Copyright information

© MAIK "Nauka/Interperiodica" 2004

Authors and Affiliations

  • V. G. Talalaev
    • 1
    • 2
    • 3
  • J. W. Tomm
    • 2
  • N. D. Zakharov
    • 3
  • P. Werner
    • 3
  • B. V. Novikov
    • 1
  • G. É. Cirlin
    • 3
    • 4
    • 5
  • Yu. B. Samsonenko
    • 4
    • 5
  • A. A. Tonkikh
    • 3
    • 4
    • 5
  • V. A. Egorov
    • 4
    • 5
  • N. K. Polyakov
    • 4
    • 5
  • V. M. Ustinov
    • 4
  1. 1.Institute of Physics (Peterhof Branch)St. Petersburg State UniversityPeterhofRussia
  2. 2.Max Born Institut für Nichtlineare Optik und KurzzeitspektroskopieBerlinGermany
  3. 3.Max Planck Institut für MikrostrukturphysikHalle (Saale)Germany
  4. 4.Ioffe Physicotechnical InstituteRussian Academy of SciencesSt. PetersburgRussia
  5. 5.Institute for Analytical InstrumentationRussian Academy of SciencesSt. PetersburgRussia

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