The DRs in Ultrathin Films (UFs) of Heavily Doped (HD) Non-parabolic Materials

Abstract

This chapter explores the DR in QWs of HD nonlinear optical Materials based on a newly formulated electron dispersion relation considering all types of anisotropies of the energy band spectrum within the framework of k·p formalism in the presence of Gaussian band tails. We have also investigated the DR in QWs of HD III–V, II–VI, IV–VI, stressed Kane type materials, Te, GaP, PtSb₂, Bi₂Te_3, Ge, GaSb, II–V, Lead Germanium Telluride, Zinc and Cadmium Diphosphides respectively. The most striking features are that the presence of poles in the dispersion relation of the materials in the absence of band tail creates the complex energy spectrum in the corresponding HD samples and effective electron mass exists within the band gap which is impossible without the concept of band tails. In the absence of band-tails, the imaginary part vanishes. The constant energy k space is a three dimensional close volume and for 2D electrons $E - k_{s}^{2}$ is the quantized circles, ellipses and closed 2D quantized surfaces in both real and complex planes respectively. Section 2.4 contains 16 open research problems, which form the integral part of this chapter. The secret of a great scholar is to know some new thing that nobody else know.

The secret of a great scholar is to know some new thing that nobody else know.