Ultra-strong nonlinear optical processes and trigonal warping in MoS2 layers

Antti Säynätjoki, Lasse Karvonen, Habib Rostami, Anton Autere, Soroush Mehravar, Antonio Lombardo, Robert A. Norwood, Tawfique Hasan, Nasser Peyghambarian, Harri Lipsanen, Khanh Kieu, Andrea C. Ferrari, Marco Polini and Zhipei Sun ()
Additional contact information
Antti Säynätjoki: Department of Electronics and Nanoengineering, Aalto University
Lasse Karvonen: Department of Electronics and Nanoengineering, Aalto University
Habib Rostami: Istituto Italiano di Tecnologia, Graphene Labs
Anton Autere: Department of Electronics and Nanoengineering, Aalto University
Soroush Mehravar: College of Optical Sciences, University of Arizona
Antonio Lombardo: University of Cambridge
Robert A. Norwood: College of Optical Sciences, University of Arizona
Tawfique Hasan: University of Cambridge
Nasser Peyghambarian: Department of Electronics and Nanoengineering, Aalto University
Harri Lipsanen: Department of Electronics and Nanoengineering, Aalto University
Khanh Kieu: College of Optical Sciences, University of Arizona
Andrea C. Ferrari: University of Cambridge
Marco Polini: Istituto Italiano di Tecnologia, Graphene Labs
Zhipei Sun: Department of Electronics and Nanoengineering, Aalto University

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Nonlinear optical processes, such as harmonic generation, are of great interest for various applications, e.g., microscopy, therapy, and frequency conversion. However, high-order harmonic conversion is typically much less efficient than low-order, due to the weak intrinsic response of the higher-order nonlinear processes. Here we report ultra-strong optical nonlinearities in monolayer MoS2 (1L-MoS2): the third harmonic is 30 times stronger than the second, and the fourth is comparable to the second. The third harmonic generation efficiency for 1L-MoS2 is approximately three times higher than that for graphene, which was reported to have a large χ (3). We explain this by calculating the nonlinear response functions of 1L-MoS2 with a continuum-model Hamiltonian and quantum mechanical diagrammatic perturbation theory, highlighting the role of trigonal warping. A similar effect is expected in all other transition-metal dichalcogenides. Our results pave the way for efficient harmonic generation based on layered materials for applications such as microscopy and imaging.

Date: 2017
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-017-00749-4 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:8:y:2017:i:1:d:10.1038_s41467-017-00749-4

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

DOI: 10.1038/s41467-017-00749-4

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 ().