Directly visualizing the momentum-forbidden dark excitons and their dynamics in atomically thin semiconductors-Reference-Cited by-同舟云学术

Directly visualizing the momentum-forbidden dark excitons and their dynamics in atomically thin semiconductors

Published:2020-12-04 Issue:6521 Volume:370 Page:1199-1204
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Madéo Julien¹^ORCID,Man Michael K. L.¹^ORCID,Sahoo Chakradhar¹²^ORCID,Campbell Marshall³^ORCID,Pareek Vivek¹^ORCID,Wong E. Laine¹^ORCID,Al-Mahboob Abdullah¹,Chan Nicholas S.¹^ORCID,Karmakar Arka¹,Mariserla Bala Murali Krishna¹⁴^ORCID,Li Xiaoqin³^ORCID,Heinz Tony F.⁵⁶^ORCID,Cao Ting⁵⁷^ORCID,Dani Keshav M.¹^ORCID

Affiliation:

1. Femtosecond Spectroscopy Unit, Okinawa Institute of Science and Technology, Okinawa, Japan 904-0495.

2. School of Physics, University of Hyderabad, Gachibowli, Hyderabad-500046, Telangana, India.

3. Physics Department, Center for Complex Quantum System, The University of Texas at Austin, Austin, TX 78712, USA.

4. Department of Physics, Indian Institute of Technology, Jodhpur, Rajasthan, India 342037.

5. Department of Applied Physics, Stanford University, Stanford, CA 94305, USA.

6. SLAC National Accelerator Laboratory, Menlo Park, CA 94720, USA.

7. Department of Materials Sciences and Engineering, University of Washington, Seattle, WA 98195, USA.

Abstract

Probing the dark state Excitons, electron-hole pairs held together by Coulomb attraction, can be generated in semiconductors under excitation and greatly influence the material's optoelectronic properties. Although bright excitons are optically active, their dark-state cousins have been more difficult to detect. They do, however, affect the optoelectronic properties through their interaction with light and bright excitons. Madéo et al. developed a pump-probe photoemission technique that is used reveal the spatial, temporal, and spectral dynamics of excitons (see the Perspective by Na and Ye). Demonstrated in two-dimensional monolayer films of tungsten diselenide, the technique could also be applicable to other semiconductor systems hosting excitonic excitations. Science , this issue p. 1199 ; see also p. 1166

Funder

National Science Foundation

U.S. Department of Energy

Micron Foundation

Japan Society for the Promotion of Science

Okinawa Institute of Science and Technology Graduate University

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference60 articles.

1. Two-dimensional van der Waals materials