|
Title
|
|
|
|
Electric-field modulation of linear dichroism and Faraday rotation in few-layer phosphorene
|
|
|
Author
|
|
|
|
|
|
|
Abstract
|
|
|
|
| Electro-optical modulators, which use an electric voltage (or an electric field) to modulate a beam of light, are essential elements in present-day telecommunication devices. Using a self-consistent tight-binding approach combined with the standard Kubo formula, we show that the optical conductivity and the linear dichroism of few-layer phosphorene can be modulated by a perpendicular electric field. We find that the field-induced charge screening plays a significant role in modulating the optical conductivity and the linear dichroism. Distinct absorption peaks are induced in the conductivity spectrum due to the strong quantum confinement along the out-of-plane direction and to the field-induced forbidden-to-allowed transitions. The field modulation of the linear dichroism becomes more pronounced with increasing number of phosphorene layers. We also show that the Faraday rotation is present in few-layer phosphorene even in the absence of an external magnetic field. This optical Hall effect is induced by the reduced lattice symmetry of few-layer phosphorene. The Faraday rotation is greatly influenced by the field-induced charge screening and is strongly dependent on the strength of perpendicular electric field and on the number of phosphorene layers. |
|
|
|
Language
|
|
|
|
English
|
|
|
Source (journal)
|
|
|
|
2D materials. - Bristol, 2014, currens
|
|
|
Publication
|
|
|
|
Bristol
:
IOP Publishing
,
2019
|
|
|
ISSN
|
|
|
|
2053-1583
[online]
|
|
|
DOI
|
|
|
|
10.1088/2053-1583/AAF47F
|
|
|
Volume/pages
|
|
|
|
6
:1
(2019)
, 12 p.
|
|
|
Article Reference
|
|
|
|
015032
|
|
|
ISI
|
|
|
|
000454321100002
|
|
|
Medium
|
|
|
|
E-only publicatie
|
|
|
Full text (Publisher's DOI)
|
|
|
|
|
|
|
Full text (open access)
|
|
|
|
|
|
|
Full text (publisher's version - intranet only)
|
|
|
|
|
|