Magorrian Theory of Electronic and Optical Properties of Atomically Thin Films of Indium Selenide

1. Auflage 2019
ISBN: 978-3-030-25715-6
Verlag: Springer International Publishing
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 87 Seiten, eBook

Reihe: Springer Theses

This thesis provides the first comprehensive theoretical overview of the electronic and optical properties of two dimensional (2D) Indium Selenide: atomically thin films of InSe ranging from monolayers to few layers in thickness. The thesis shows how the electronic propertes of 2D InSe vary significantly with film thickness, changing from a weakly indirect semiconductor for the monolayer to a direct gap material in the bulk form, with a strong band gap variation with film thickness predicted and recently observed in optical experiments. The proposed theory is based on a specially designed hybrid k.p tight-binding model approach (HkpTB), which uses an intralayer k.p Hamiltonian to describe the InSe monolayer, and tight-binding-like interlayer hopping. Electronic and optical absorption spectra are determined, and a detailed description of subbands of electrons in few-layer films and the influence of spin-orbit coupling is provided. The author shows that the principal optical excitations of InSe films with the thickness from 1 to 15 layers broadly cover the visible spectrum, with the possibility of extending optical functionality into the infrared and THz range using intersubband transitions.

Zielgruppe

Research

Autoren/Hrsg.

Magorrian, Samuel J.

Inhaltsverzeichnis

Part I: Introduction and basics.- Scienti?c context and motivation.- Laser-plasmas.- Part II: Experimental methods.- High-power lasers.- Transportable Paul trap for isolated micro-targets in vacuum.- Part III: Laser-microplasma interactions.- Laser-driven ion acceleration using isolated micro-sphere targets.- Laser-driven micro-source for bi-modal radiographic imaging.- Part IV: Summary and perspectives.- Summary.- Challenges and perspectives.- Appendix.