Quantum-dimensional phenomena in dielectric superlatticies: modeling

Dimitry D. Grachov; Sergey Saveljev

doi:10.1117/12.185167

25 August 1994 Quantum-dimensional phenomena in dielectric superlatticies: modeling

Dimitry D. Grachov, Sergey Saveljev

Proceedings Volume 2212, Linear and Nonlinear Integrated Optics; (1994) https://doi.org/10.1117/12.185167
Event: Integrated Optoelectronics '94, 1994, Lindau, Germany

Abstract

In this paper we propose a model of the planar superlattice structure fabricated from linear dielectric materials. Interesting features of such structures are `anomalous' nonlinear and anisotropic optical properties, which can be observed in experiments with planar waveguides. These properties can be explained by the model. The model is based on the proposal, that internal electron structure in the above superlattices can be described by Hamiltonian, which includes periodical 3D potential of a crystal, modulated by 1D periodical superlattice potential, which appears as a result of difference between zone structures of materials forming the superlattice. Full Hamilton operator also includes standard parts: Hartry potential and inter-electron quantum-correlation potential. Besides that in the case of dielectric superlattices we must also consider the deformation potential in layers, caused by static deformation of layers and electron-phonon interaction. In order to describe carrier transportation in the structure it is reasonable to use the `effective mass'-approximation. It is useful to obtain superlattice wave functions by the `modulation' method, where electron wave functions in bulk sample are used as nonperturbated. Therefore, values of effective masses of carriers in bulk samples of materials, width of energy gap, value of Fermi-level, position of energy zones are the initial parameters of the model, the same as thicknesses of layers, value of non-isotropic deformation in layers and other technological parameters. In accordance with the model, new types of dielectric superlattices are proposed, for example constructed from asymmetrically deformated layers of a single dielectric material.

Citation Download Citation

Dimitry D. Grachov and Sergey Saveljev "Quantum-dimensional phenomena in dielectric superlatticies: modeling", Proc. SPIE 2212, Linear and Nonlinear Integrated Optics, (25 August 1994); https://doi.org/10.1117/12.185167

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