Optical generation of valley polarization in atomically thin semiconductors

Xiaodong Xu; Di Xiao; Wang Yao

doi:10.1117/12.2003425

29 March 2013 Optical generation of valley polarization in atomically thin semiconductors

Xiaodong Xu, Di Xiao, Wang Yao

Proceedings Volume 8635, Advances in Photonics of Quantum Computing, Memory, and Communication VI; 86350A (2013) https://doi.org/10.1117/12.2003425
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

Electronic valleys refer to energy extrema in momentum space. In the same way as spin is utilized for spintronics, valleys can be considered as pseudo-spins for valley based electronics and optoelectronics. Although the concept of valleytronics has been proposed for many years, progress has been hampered by a lack of ideal physical systems, in particular for optically driven valleytronics. Here, we show that monolayer group VI transition metal dichalcogenides is a promising system to meet this challenge. In particular, there are circularly polarized optical selection rules associated with valley index, which allows addressing the individual valleys by optical means. We further demonstrate optical generation of valley polarization using monolayer MoS₂ as a model system. Our results open the door for optical investigation of valley physics in monolayer semiconductors.

Citation Download Citation

Xiaodong Xu, Di Xiao, and Wang Yao "Optical generation of valley polarization in atomically thin semiconductors", Proc. SPIE 8635, Advances in Photonics of Quantum Computing, Memory, and Communication VI, 86350A (29 March 2013); https://doi.org/10.1117/12.2003425

ACCESS THE FULL ARTICLE

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