Skip to main content
Log in

Excitonic Quasimolecules Formed by Spatially Separated Electrons and Holes in a Ge/Si Heterostructure with Germanium Quantum Dots

  • Published:
Journal of Applied Spectroscopy Aims and scope

It is shown that in a Ge/Si nanostructure with germanium quantum dots, two Ge quantum dots act as an excitonic quasimolecule, where the excitons (formed by spatially separated electrons and holes) are localized above the surfaces of the quantum dots. A substantial increase in binding energy is observed for the singlet ground state of the excitonic quasimolecule in the nanosystem, compared with the binding energy of a biexciton in a silicon single crystal. It is established that the major contribution to the binding energy of the quasimolecule comes from the electron–hole exchange interaction energy, which is considerably greater than the contribution from the electron–hole Coulomb interaction.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others


  1. A. I. Yakimov, A. V. Dvurechenskii, and A. I. Nikiforov, Pis’ma Zh. Éksp. Teor. Fiz., 73, No. 4, 598–602 (2001).

    Google Scholar 

  2. Zh. V. Smagina, A. V. Dvurechenskii, and V. A. Seleznev, Fiz. Tekh. Poluprovodn., 49, No. 6, 767–772 (2015).

    Google Scholar 

  3. S. I. Pokutnyi, Fiz. Niz. Temp., 42, No. 12, 1471–1476 (2016).

    Google Scholar 

  4. S. I. Pokutnyi, Y. N. Kulchin, V. P. Dzyuba, and A. V. Amosov, J. Nanophoton., 10, No. 3, 036008-(1–8) (2016); doi: 10.1117/1.JNP.10.036008.

  5. K. Lalumiure, B. Sanders, and F. Van Loo, Phys. Rev. A, 88, No. 10, 43806–43812 (2013).

    Article  ADS  Google Scholar 

  6. F. Van Loo, A. Fedorov, and K. Lalumiure, Science, 342, No. 6, 1494–1496 (2013).

    ADS  Google Scholar 

  7. S. I. Pokutnyi, Semiconductors, 47, No. 12, 1626–1635 (2013); doi: 10.1134/S1063782613060225.

    Article  ADS  Google Scholar 

  8. S. I. Pokutnyi, Semiconductors, 47, No. 6, 791–798 (2013); doi: 10.1134/S1063782613120178.

    Article  ADS  MathSciNet  Google Scholar 

  9. Yu. I. Ukhanov, Optical Properties of Semiconductors [in Russian], Nauka, Moscow (1977), pp. 44–46.

    Google Scholar 

  10. S. V. Gaponenko, Introduction to Nanophotonics, Cambridge University Press, New York (2010), pp. 224–232.

    Book  Google Scholar 

  11. S. V. Gaponenko, H. V. Demir, and C. Seassal, Opt. Express, 24, No. 2, 430–434 (2016).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations


Corresponding author

Correspondence to S. I. Pokutnyi.

Additional information

Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 84, No. 2, pp. 248–252, March–April, 2017.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Pokutnyi, S.I. Excitonic Quasimolecules Formed by Spatially Separated Electrons and Holes in a Ge/Si Heterostructure with Germanium Quantum Dots. J Appl Spectrosc 84, 268–272 (2017).

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: