Large linear and nonlinear electro-optic coefficients in two-dimensional ferroelectrics

Analytical derivations and first-principles calculations are performed to investigate the electro-optic (EO) response of the two-dimensional ferroelectric SnS in its monolayer form. In addition to derive the formula for EO coefficients for two-dimensional systems, large linear and nonlinear electro-...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. B 2022-08, Vol.106 (8), Article L081404
Main Authors: Jiang, Zhijun, Paillard, Charles, Churchill, Hugh O. H., Xia, Minggang, Zhang, Shengli, Xiang, Hongjun, Bellaiche, L.
Format: Article
Language:English
Subjects:
Optics
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Analytical derivations and first-principles calculations are performed to investigate the electro-optic (EO) response of the two-dimensional ferroelectric SnS in its monolayer form. In addition to derive the formula for EO coefficients for two-dimensional systems, large linear and nonlinear electro-optic coefficients are discovered, along with a strongly nonlinear electro-optic response as a function of electric field. The origin of these electro-optic responses is further found and involves a few specific phonon modes, in general, and the evolution of their frequencies and atomic characteristics under electric fields, in particular. Large linear and nonlinear electro-optic coefficients can be found in other two-dimensional ferroelectrics, paving the way for potential optical device applications.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.106.L081404