Materials, Photonic Devices, and Sensors

Biexciton in nanoheterostructures of germanium quantum dots

[+] Author Affiliations
Sergey I. Pokutnyi

National Academy of Sciences of Ukraine, Chuiko Institute of Surface Chemistry, Kyiv, Ukraine

Opt. Eng. 56(6), 067104 (Jun 07, 2017). doi:10.1117/1.OE.56.6.067104
History: Received January 30, 2017; Accepted May 18, 2017
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Abstract.  The theory of biexciton (formed from spatially separated electrons and holes) in a nanosystem consisting of double quantum dots (QDs) of germanium synthesized in a silicon matrix is presented. It is shown that the major contribution to the biexciton binding energy is made by the energy of the exchange interaction of electrons with holes and this contribution is much more substantial than the contribution of the energy of Coulomb interaction between the electrons and holes. The position of the biexciton state energy band depends both on the mean radius of the QDs and the distance between their surfaces, which enables one to purposefully control it by varying these parameters of the nanostructure.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Sergey I. Pokutnyi
"Biexciton in nanoheterostructures of germanium quantum dots", Opt. Eng. 56(6), 067104 (Jun 07, 2017). ; http://dx.doi.org/10.1117/1.OE.56.6.067104


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