Abstract
The spectra of two types of interface phonons (top and side optical) are studied within the framework of dielectric continuum model for combined nanoheterosystems consisting of semiconductor cylindrical quantum dots inside the cylindrical quantum wire placed into dielectric or semiconductor medium. The dependencies of both types of interface phonon energies on the quasiwave numbers and geometric parameters of nanosystem are calculated and analysed.
Highlights
For the past few years there has been observed a rapid development of experimental and theoretical investigations of the nanoscale objects but their spatial combinations as well [1]
The numeric calculations were performed for the cylindrical nanosystems CdS/HgS/CdS placed into ZnS outer medium or into the water
It should to be mentioned that the behavior of the interface phonon spectra depends on the geometrical parameters of a nanosystem and on the type of vibrations (SSO or top surface optical (TSO)) but the energies of all these phonon modes are always located between the energies of LO and TO phonons of the respective bulk crystals (ΩLCdS, ΩTCdS, ΩLZnS, ΩTZnS, and ΩLHgS, ΩTHgS shown in the figures by dashed lines)
Summary
Fedkovych Chernivtsi National University, 2, Kotsyubinskoho Str., Chernivtsi, 58012, Ukraine∗. The spectra of two types of interface phonons (top and side optical) are studied within the framework of dielectric continuum model for combined nanoheterosystems consisting of semiconductor cylindrical quantum dots inside the cylindrical quantum wire placed into dielectric or semiconductor medium. The dependencies of both types of interface phonon energies on the quasiwave numbers and geometric parameters of nanosystem are calculated and analysed.
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