Generation of half-integer harmonics and efficient THz-to-visible frequency conversion in strained graphene

Autor: Marco Ornigotti, Luca Ornigotti, Fabio Biancalana
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: APL Photonics, Vol 6, Iss 6, Pp 060801-060801-9 (2021)
Druh dokumentu: article
ISSN: 2378-0967
DOI: 10.1063/5.0049678
Popis: We study the generation of harmonics from graphene under the influence of an artificial magnetic field, generated via bending of a graphene flake. We show how the Landau level structure induced by the pseudomagnetic field breaks the centrosymmetry of graphene, thus allowing the generation of even harmonics. We also show that depending on the impinging pulse duration, the nonlinear signal does not only contain the integer harmonics of the impinging pulse but also its half-integer ones due to the peculiar square-root-like nature of Landau levels in graphene.
Databáze: Directory of Open Access Journals