Pseudopotential in resonant regimes

Pseudopotential in resonant regimes

Comparison of imaging with sub-wavelength resolution in the canalization and resonant tunnelling regimes

We compare the properties of subwavelength imaging in the visible wavelength range for metal-dielectric multilayers operating in the canalization and the resonant tunnelling regimes. The analysis is based on the transfer matrix method and time domain simulations. We show that Point Spread Functions for the first two resonances in the canalization regime are approximately Gaussian in shape. Mate...

Electronic polarization in the ultrasoft pseudopotential formalism

An expression is given for the electronic polarization of an insulating crystal within the ultrasoft pseudopotential scheme. The pseudopotential charge-augmentation terms modify the usual Berry-phase expression, and also give rise to a second term that takes the form of a conventional expectation value.

The Pseudopotential Plane Wave Approach

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Pseudopotential Calculations of GeSn Pseudopotential calculations of strained-GeSn/SiGeSn hetero-structures

We have obtained empirical pseudopotential parameters for α-Sn and employed the pseudopotential method along with the virtual crystal approximation to model GeSn and SiGeSn alloys. The calculated direct and indirect band gaps of GeSn and SiGeSn show good agreement with experimental data at 300K available till date. The derived pseudopotential parameter set was used to extract various band struc...