Lithography-free IR polarization converters via orthogonal in-plane phonons in α-MoO3 flakes

Sina Abedini Dereshgi; Thomas G. Folland; Akshay A. Murthy; Xianglian Song; Ibrahim Tanriover; Vinayak P. Dravid; Joshua D. Caldwell; Koray Aydin

doi:10.1038/s41467-020-19499-x

Back

Lithography-free IR polarization converters via orthogonal in-plane phonons in α-MoO3 flakes

Journal article

Open access

Peer reviewed

Lithography-free IR polarization converters via orthogonal in-plane phonons in α-MoO3 flakes

Sina Abedini Dereshgi, Thomas G. Folland, Akshay A. Murthy, Xianglian Song, Ibrahim Tanriover, Vinayak P. Dravid, Joshua D. Caldwell and Koray Aydin

Nature communications, Vol.11(1), pp.5771-5771

11/13/2020

DOI: 10.1038/s41467-020-19499-x

PMCID: PMC7666183

PMID: 33188172

Files and links (1)

url

https://doi.org/10.1038/s41467-020-19499-xView

Published (Version of record) Open Access

Abstract

Exploiting polaritons in natural vdW materials has been successful in achieving extreme light confinement and low-loss optical devices and enabling simplified device integration. Recently, α-MoO 3 has been reported as a semiconducting biaxial vdW material capable of sustaining naturally orthogonal in-plane phonon polariton modes in IR. In this study, we investigate the polarization-dependent optical characteristics of cavities formed using α-MoO 3 to extend the degrees of freedom in the design of IR photonic components exploiting the in-plane anisotropy of this material. Polarization-dependent absorption over 80% in a multilayer Fabry-Perot structure with α-MoO 3 is reported without the need for nanoscale fabrication on the α-MoO 3 . We observe coupling between the α-MoO 3 optical phonons and the Fabry-Perot cavity resonances. Using cross-polarized reflectance spectroscopy we show that the strong birefringence results in 15% of the total power converted into the orthogonal polarization with respect to incident wave. These findings can open new avenues in the quest for polarization filters and low-loss, integrated planar IR photonics and in dictating polarization control. Here, the authors investigate the polarization-dependent optical characteristics of cavities formed using α-MoO 3 to extend the degrees of freedom in the design of IR photonic components exploiting the in-plane anisotropy of this material. Absorption over 80% and polarization conversion is reported without the need for nanoscale fabrication.

Materials for optics

Metamaterials

Mid-infrared photonics

Polaritons

Two-dimensional materials

Details

Title: Subtitle: Lithography-free IR polarization converters via orthogonal in-plane phonons in α-MoO3 flakes
Creators: Sina Abedini Dereshgi - Evanston, IL 60208 USA
Thomas G. Folland - University of Iowa
Akshay A. Murthy - Northwestern University
Xianglian Song - Northwestern University
Ibrahim Tanriover - Northwestern University
Vinayak P. Dravid - Northwestern University
Joshua D. Caldwell - Vanderbilt University
Koray Aydin - Northwestern University
Resource Type: Journal article
Publication Details: Nature communications, Vol.11(1), pp.5771-5771
DOI: 10.1038/s41467-020-19499-x
PMID: 33188172
PMCID: PMC7666183
NLM abbreviation: Nat Commun
ISSN: 2041-1723
eISSN: 2041-1723
Publisher: Nature Publishing Group UK
Grant note: N00014-18-1-2107; N00014-17-1-2425; N00014-18-1-2107 / ; FA9550-17-1-0348 / ; DMR-1929356 / ;
Language: English
Date published: 11/13/2020
Academic Unit: Physics and Astronomy
Record Identifier: 9984429046402771

Metrics

10 Record Views

70 Times Cited - Web of Science