Probing the Response of Two-Dimensional Crystals by Optical Spectroscopy

Yilei Li (Autor)

Buch | Softcover

XII, 69 Seiten

2016 | 1. Softcover reprint of the original 1st ed. 2016
Springer International Publishing (Verlag)
978-3-319-36984-6 (ISBN)

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This thesis focuses on the study of the optical response of new atomically thin two-dimensional crystals, principally the family of transition metal dichalcogenides like MoS 2 . One central theme of the thesis is the precise treatment of the linear and second-order nonlinear optical susceptibilities of atomically thin transition metal dichalcogenides. In addition to their significant scientific interest as fundamental material responses, these studies provide essential knowledge and convenient characterization tools for the application of these 2D materials in opto-electronic devices. Another important theme of the thesis is the valley physics of atomically thin transition metal dichalcogenides. It is shown that the degeneracy in the valley degree of freedom can be lifted and a valley polarization can be created using a magnetic field, which breaks time reversal symmetry in these materials. These findings enhance our basic understanding of the valley electronic states and open up new opportunities for valleytronic applications using two-dimensional materials.

Introduction and Background.- Intrinsic Doping Dependence of Raman 2D Mode in Graphene: Signatures of Electron-Electron Interaction.- Coupling of Strongly Localized Graphene Plasmons to Molecular Vibrations.- Dielectric Response of a Thin Sheet.- Measurement of the Optical Dielectric Function of Monolayer Transition Metal Dichalcogenides: MoS 2 , MoSe 2 , WS 2 , and WSe 2 .- Measurement of the Second-Order Nonlinear Susceptibility and Probing Symmetry Properties of Few-Layer MoS 2 and h-BN by Optical Second-Harmonic Generation.- Valley Splitting and Polarization by Zeeman Effect in Monolayer MoSe 2.- Conclusion and Prospect.

Erscheinungsdatum	19.08.2017
Reihe/Serie	Springer Theses
Zusatzinfo	XII, 69 p.
Verlagsort	Cham
Sprache	englisch
Maße	155 x 235 mm
Gewicht	145 g
Themenwelt	Naturwissenschaften ► Physik / Astronomie ► Optik
Themenwelt	Technik ► Elektrotechnik / Energietechnik
Schlagworte	2D materials in opto-electronic devices • Atomically thin 2D materials • Atomically thin transition metal dichalcogenides • Graphene plasmon enhanced vibrational sensing • Optical spectroscopy of dichalcogenides • Optics of monolayer transition metal dichalcogenid • Optics of monolayer transition metal dichalcogenides • Raman 2D mode in Graphene • Transition metal dichalcogenides • Valley physics • Valleytronics using 2D materials
ISBN-10	3-319-36984-9 / 3319369849
ISBN-13	978-3-319-36984-6 / 9783319369846
Zustand	Neuware