Spatial Transformations of High-Order Harmonic Generation in Transition Metal Dichalcogenides
ADVANCES IN ULTRAFAST CONDENSED PHASE PHYSICS IV（2024）
Univ Paris Saclay
Abstract
High-order harmonics were generated from mono- and polycrystaline molybdenum disulfide (MoS2) monolayers with an infrared femtosecond pulse. We control the Orbital Angular Momentum (OAM) and spatial polarization distribution of the generation beam by using a liquid crystal Q-plate. We then measure the OAM and the full polarization map of the emitted harmonics. We observe that monocrystaline MoS2 behaves as a polarization converter, while polycrystaline MoS2 may be used as a phase mask.
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Key words
High-order Harmonic Generation (HHG),Transition Metal Dichalcogenides (TMDs),Crystal symmetries,Orbital Angular Momentum (OAM),Vector beam
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