Optical properties of atomically thin transition metal dichalcogenides: observations and puzzles
By M. Koperski, M. Molas, A. Arora, K. Nogajewski, A. Slobodeniuk, C. Faugeras, M. Potemski. 2016
212 citations recorded by the source corpus.
Abstract Recent results on the optical properties of monolayer and few layers of semiconducting transition metal dichalcogenides are reviewed. Experimental observations are presented and discussed in the frame of existing models, highlighting the limits of our understanding in this emerging field of research. We first introduce the representative band structure of these systems and their interband optical transitions. The effect of an external magnetic field is then considered to discuss Zeeman spectroscopy and optical pumping experiments, both revealing phenomena related to the valley degree of freedom. Finally, we discuss the observation of single photon emitters in different types of layered materials, including wide band gap hexagonal boron nitride. While going through these topics, we try to focus on open questions and on experimental observations, which do not yet have a clear explanation.
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/4f975c6cb4b56099610b05931ce087fb745bcb4a
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Citations in the corpus
- Exciton physics and device application of two-dimensional transition metal dichalcogenide semiconductors (2018, background): “with the measured temperature-dependent PL yield [77]. Brightening of these states was first demonstrated in low-temperature magneto-PL experiments, where strong in-plane magnetic fields were applied [25, 26, 44]. The latter couple to the charge carrier spin via the Zeeman effect, which mixes the sp”