Nonlinear Dispersion Relation and Out‐of‐Plane Second Harmonic Generation in MoSSe and WSSe Janus Monolayers

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.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Nonlinear Dispersion Relation and Out‐of‐Plane Second Harmonic Generation in MoSSe and WSSe Janus Monolayers ; day:01 ; month:08 ; year:2023 ; extent:8 ; Advanced optical materials ; (01.08.2023) (gesamt 8)

Contributors, Places and Time

• Creator: Petrić, Marko M. ; Villafañe, Viviana ; Herrmann, Paul ; Ben Mhenni, Amine ; Qin, Ying ; Sayyad, Yasir ; Shen, Yuxia ; Tongay, Sefaattin ; Müller, Kai ; Soavi, Giancarlo ; Finley, Jonathan J. ; Barbone, Matteo

Further information

• DOI: 10.1002/adom.202300958
• URN: urn:nbn:de:101:1-2023080215052080555437
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 11:02 AM CEST