The optical conductivity of few-layer black phosphorus by infrared spectroscopy

Guowei Zhang, Shenyang Huang, Fanjie Wang, Qiaoxia Xing, Chaoyu Song, Chong Wang, Yuchen Lei, Mingyuan Huang () and Hugen Yan ()
Additional contact information
Guowei Zhang: Fudan University
Shenyang Huang: Fudan University
Fanjie Wang: Fudan University
Qiaoxia Xing: Fudan University
Chaoyu Song: Fudan University
Chong Wang: Fudan University
Yuchen Lei: Fudan University
Mingyuan Huang: Southern University of Science and Technology
Hugen Yan: Fudan University

Nature Communications, 2020, vol. 11, issue 1, 1-7

Abstract: Abstract The strength of light-matter interaction is of central importance in photonics and optoelectronics. For many widely studied two-dimensional semiconductors, such as MoS2, the optical absorption due to exciton resonances increases with thickness. However, here we will show, few-layer black phosphorus exhibits an opposite trend. We determine the optical conductivity of few-layer black phosphorus with thickness down to bilayer by infrared spectroscopy. On the contrary to our expectations, the frequency-integrated exciton absorption is found to be enhanced in thinner samples. Moreover, the continuum absorption near the band edge is almost a constant, independent of the thickness. We will show such scenario is related to the quanta of the universal optical conductivity of graphene (σ0 = e2/4ħ), with a prefactor originating from the band anisotropy.

Date: 2020
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-020-15699-7 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:11:y:2020:i:1:d:10.1038_s41467-020-15699-7

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

DOI: 10.1038/s41467-020-15699-7

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 ().