In the framework of dipole approximation, it is shown that the quantities (the oscillator strengths of transitions, the dipole moments for transitions, and the polarizability) describing optical absorption on surface exciton states with spatially separated electrons and holes (the hole moves in the germanium quantum dot and the electron is localized over the spherical interface of the silicon quantum dot matrix) assume giant values considerably exceeding the typical values of the corresponding quantities for semiconductors under the action of low-intensity light.
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Data availability statement
This manuscript has associated data in a data repository. [Authors’ comment: All data included in this manuscript are available upon request by contacting with the corresponding author.]
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Pokutnyi, S.I. Polarizability of germanium quantum dots with spatially separated electrons and holes. Eur. Phys. J. Plus 135, 74 (2020). https://doi.org/10.1140/epjp/s13360-019-00050-x