Theoretical calculations of nonlinear optical calculations of 2D materials

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Ventura, G (Author) Other; Passos, D (Author) Other; Viana Parente Lopes, J (Author) FCUP; Lopes dos Santos, JMBL (Author) FCUP

Journal

Title: EPJ Web of Conferences

ISSN: 2101-6275

Publisher: EDP Sciences

Other information

Authenticus ID: P-00S-0NW

DOI: 10.1051/epjconf/202023303001

Abstract (EN): <jats:p>One important feature of two dimensional (2D) materials is that they possess an exceptional nonlinear optical (NLO) response to light, with conduc¬tivities that are several orders of magnitude larger than their 3D counterparts. The theoretical descriptions of these NLO responses in crystalline systems in¬volve two different representations of the perturbation: the length and velocity gauges. The former has been the formalism of choice for the past two decades; the latter was implemented only recently, due to concerns that it could not be pratically implemented without breaking sum rules ¿ a set of identities that en¬sure the equivalence between the two formalisms ¿ which would then render the results unphysical. In this work, we shall review and summarize our contri¬butions to the study of the two formalisms and of their relationship by means of the aforementioned sum rules.</jats:p>

Language: English

Type (Professor's evaluation): Scientific