Coherent Light-Matter Interactions in Monolayer Transition-Metal Dichalcogenides

Coherent Light-Matter Interactions in Monolayer Transition-Metal Dichalcogenides

English | PDF,EPUB | 2017 (2018 Edition) | 142 Pages | ISBN : 3319695533 | 7.63 MB

This thesis presents optical methods to split the energy levels of electronic valleys in transition-metal dichalcogenides (TMDs) by means of coherent light-matter interactions. The electronic valleys found in monolayer TMDs such as MoS2, WS2, and WSe2 are among the many novel properties exhibited by semiconductors when thinned down to a few atomic layers, and have have been proposed as a new way to carry information in next generation devices (so-called valleytronics).
These valleys are, however, normally locked in the same energy level, which limits their potential use for applications. The author describes experiments performed with a pump-probe technique using transient absorption spectroscopy on MoS2 and WS2. It is demonstrated that hybridizing the electronic valleys with light allows one to optically tune their energy levels in a controllable valley-selective manner. In particular, by using off-resonance circularly polarized light at small detuning, one can tune the energy level of one valley through the optical Stark effect. Also presented within are observations, at larger detuning, of a separate contribution from the so-called Bloch¨CSiegert effect, a delicate phenomenon that has eluded direct observation in solids. The two effects obey opposite selection rules, enabling one to separate the two effects at two different valleys.


[Fast Download] Coherent Light-Matter Interactions in Monolayer Transition-Metal Dichalcogenides

Ebooks related to "Coherent Light-Matter Interactions in Monolayer Transition-Metal Dichalcogenides" :
Holistic Simulation of Geotechnical Installation Processes: Numerical and Physical Modelling
Quantum Dots for Quantum Information Technologies (Nano-Optics and Nanophotonics)
Thermo-Fluid Dynamics of Two-Phase Flow, 2nd edition
Fundamentals of Applied Electromagnetics, 5th edition
Entropy Demystified: The Second Law Reduced to Plain Common Sense
High-Order Harmonic Generation in Laser Plasma Plumes
Semiconductor Optics
Magnetic Confinement Fusion Driven Thermonuclear Energy
Solid-State Physics: An Introduction to Principles of Materials Science
Biomechanical Systems Technology
Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.