Observation of Intense Second Harmonic Generation from MoS${}_2$ Atomic Crystals

Abstract

Since de discovery of graphene, the family of 2-dimensional materials has attracted much recent attention. In this work, the nonlinear optical properties of few-layer MoS2 two-dimensional crystals are studied using femtosecond laser pulses. We observed highly efficient second harmonic generation from the odd-layer crystals, which shows a polarization intensity dependence that directly reveals the underlying symmetry and orientation of the crystal. Additionally, the measured second-order susceptibility spectra provide information about the electronic structure of the material. Our results open up new opportunities for studying the non-linear optical properties in these novel 2D crystals.

5 pages, 3 figures

References in corpus (8)

• Two Dimensional Atomic Crystals
• Anomalous Lattice Vibrations of Single and Few-Layer MoS2
• Half-Metallic Graphene Nanoribbons
• Valley polarization in MoS2 monolayers by optical pumping
• Single-Layer MoS2 Phototransistors
• Emergence of Superlattice Dirac Points in Graphene on Hexagonal Boron Nitride
• Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides
• Visibility of dichalcogenide nanolayers

Cited by in corpus (154)

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