Prediction of hyperbolic exciton-polaritons in monolayer black phosphorus

Fanjie Wang, Chong Wang, Andrey Chaves, Chaoyu Song, Guowei Zhang, Shenyang Huang, Yuchen Lei, Qiaoxia Xing, Lei Mu, Yuangang Xie and Hugen Yan ()
Additional contact information
Fanjie Wang: Fudan University
Chong Wang: Beijing Institute of Technology
Andrey Chaves: Universidade Federal do Ceará
Chaoyu Song: Fudan University
Guowei Zhang: Institute of Flexible Electronics, Northwestern Polytechnical University
Shenyang Huang: Fudan University
Yuchen Lei: Fudan University
Qiaoxia Xing: Fudan University
Lei Mu: Fudan University
Yuangang Xie: Fudan University
Hugen Yan: Fudan University

Nature Communications, 2021, vol. 12, issue 1, 1-7

Abstract: Abstract Hyperbolic polaritons exhibit large photonic density of states and can be collimated in certain propagation directions. The majority of hyperbolic polaritons are sustained in man-made metamaterials. However, natural-occurring hyperbolic materials also exist. Particularly, natural in-plane hyperbolic polaritons in layered materials have been demonstrated in MoO3 and WTe2, which are based on phonon and plasmon resonances respectively. Here, by determining the anisotropic optical conductivity (dielectric function) through optical spectroscopy, we predict that monolayer black phosphorus naturally hosts hyperbolic exciton-polaritons due to the pronounced in-plane anisotropy and strong exciton resonances. We simultaneously observe a strong and sharp ground state exciton peak and weaker excited states in high quality monolayer samples in the reflection spectrum, which enables us to determine the exciton binding energy of ~452 meV. Our work provides another appealing platform for the in-plane natural hyperbolic polaritons, which is based on excitons rather than phonons or plasmons.

Date: 2021
References: Add references at CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.nature.com/articles/s41467-021-25941-5 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25941-5

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-021-25941-5

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().