Nonlinear Dispersion Relation and Out‐of‐Plane Second Harmonic Generation in MoSSe and WSSe Janus Monolayers
Source abstract
Abstract
Abstract Janus transition metal dichalcogenides are an emerging class of atomically thin materials with engineered broken mirror symmetry that gives rise to long‐lived dipolar excitons, Rashba splitting, and topologically protected solitons. They hold great promise as a versatile nonlinear optical platform due to their broadband harmonic generation tunability, ease of integration on photonic structures, and nonlinearities beyond the basal crystal plane. Here, second and third harmonic generation in MoSSe and WSSe Janus monolayers is studied. Polarization‐resolved spectroscopy is used to map the full second‐order susceptibility tensor of MoSSe, including its out‐of‐plane components. In addition, the effective third‐order susceptibility and the second‐order nonlinear dispersion close to exciton resonances for both MoSSe and WSSe are measured at room and cryogenic temperatures. This work sets a bedrock for understanding the nonlinear optical properties of Janus transition metal dichalcogenides and probing their use in the next‐generation on‐chip multifaceted photonic devices.
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Research context
OpenAlex topics: 2D Materials and Applications · Advanced Fiber Laser Technologies · Strong Light-Matter Interactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Walter Schottky Institut and Department of Electrical and Computer Engineering Technische Universität München, Am Coulombwall 4 85748 Garching Germany
Munich Center for Quantum Science and Technology (MCQST) Schellingstrasse 4 80799 Munich Germany
Walter Schottky Institut and Physik‐Department Technische Universität München, Am Coulombwall 4 85748 Garching Germany
Institute of Solid State Physics Friedrich Schiller University Jena Max‐Wien‐Platz 1 07743 Jena Germany
Materials Science and Engineering School for Engineering of Matter Transport and Energy, Arizona State University Tempe Arizona 85287 USA
Abbe Center of Photonics Friedrich Schiller University Jena Albert‐Einstein‐Straße 6 07745 Jena Germany
Funding
U.S. Department of Energy · National Science Foundation · Horizon 2020 Framework Programme · Deutsche Forschungsgemeinschaft · International Graduate School of Science and Engineering · Alexander von Humboldt-Stiftung · Bayerische Akademie der Wissenschaften
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