CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume PC11999 > Article
Presentation
7 March 2022 Theory and first-principles calculations of excitons in 2D materials: photoemission spectra and ultrafast dynamics
Ting Cao
Author Affiliations +
Proceedings Volume PC11999, Ultrafast Phenomena and Nanophotonics XXVI; PC119990K (2022) https://doi.org/10.1117/12.2609013
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
This talk will show our recent theoretical and computational studies of new exciton physics in monolayer transition metal dichalcogenides. By developing a first-principle method based on many-body perturbation theories, we find that the photoelectrons from excitons hold unique energy dispersions and spectra weights, which unveil the fundamental physical properties of the excitons. The theoretical findings agree well with the experimentally measured pump-probe photoemission spectra of excitons in monolayer WSe2 (Science 370, 1199 (2020) and Science Advances 7, eabg0192 (2021)). We then demonstrate a valley- and spin-selective excitonic energy relaxation pathway, which leads to novel ultrafast dynamics in monolayer transition metal dichalcogenides. We further connect our theoretical discoveries to experimental results and explore their potential applications.
Conference Presentation
© (2022) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Ting Cao "Theory and first-principles calculations of excitons in 2D materials: photoemission spectra and ultrafast dynamics", Proc. SPIE PC11999, Ultrafast Phenomena and Nanophotonics XXVI, PC119990K (7 March 2022); https://doi.org/10.1117/12.2609013
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 PRESENTATION
WATCH
PRESENTATION SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
KEYWORDS
Excitons
Ultrafast phenomena
Transition metals
Phonons
Physics
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top