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

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 Mo...

Colloidal Continuous Injection Synthesis of Fluorescent MoX2 (X = S, Se) Nanosheets as a First Step Toward Photonic Applications

Transition-metal dichalcogenide (TMD) nanosheets have become an intensively investigated topic in the field of 2D nanomaterials, especially due to the direct semiconductor nature, and the broken inversion symmetry in the odd-layer number, of some of their family members. These properties make TMDs attractive for different technological applications such as photovoltaics, optoelectronics, valleytronics, and hydrogen evolution reactions. Among them, MoX2 (X = S and Se) are turned to direct gap ...

Charge-tuneable biexciton complexes in monolayer WSe2

: Monolayer transition metal dichalcogenides have strong Coulomb-mediated many-body interactions. Theoretical studies have predicted the existence of numerous multi-particle excitonic states. Two-particle excitons and three-particle trions have been identified by their optical signatures. However, more complex states such as biexcitons have been elusive due to limited spectral quality of the optical emission. Here, we report direct evidence of two biexciton complexes in monolayer tungsten dis...

Workflows for analysing and utilizing large-scale 3D datasets of cultural heritage

For 3D content, large-scale datasets, such as Objaverse or ShapeNet, and repositories, such as Sketchfab, have been compiled. Within the European 3DBigDataSpace project, a consortium of 10 partners assesses open licensed 3D models to select and retrieve those models particularly representing cultural heritage objects in Europe to aggregate them into the European Data Space. As key part of that work is the classification and geolocalization of 3D content, with mesh models viewable via differen...

3DGeoRef: an automated framework for georeferencing heritage 3D models

Geolocalization is the process of determining the precise geographical coordinates and orientation of a device or person or object. Georeferencing is the same process but referred to images, maps or 3D models. Pinpointing where in the world an image was acquired or a 3D model is located, down to a decimetre or meter error, remains a challenge in photogrammetry and computer vision, especially when no priors are available or not touristic locations are considered. Methods have evolved from simp...

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Prodotti recenti

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

Colloidal Continuous Injection Synthesis of Fluorescent MoX2 (X = S, Se) Nanosheets as a First Step Toward Photonic Applications

Charge-tuneable biexciton complexes in monolayer WSe2

Workflows for analysing and utilizing large-scale 3D datasets of cultural heritage

3DGeoRef: an automated framework for georeferencing heritage 3D models

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