Multilayered hyperbolic metamaterial using 2D MoS2 as constituent

This research delves into the emerging potential of molybdenum disulfide (MoS2), a transition metal chalcogenide, which has shown promising applications in optoelectronic devices since the global growth of Graphene, owing to its unique tunability of the functional properties with thickness. In the face of conventional fabrication techniques like exfoliation and CVD struggling with scalability and coverage issues, this work introduces a novel two-step bottom-up magnetron sputtering deposition process for synthesizing MoS2 films. This method stands out for its versatility in depositing both amorphous and crystalline MoS2 and its industrial manufacturing scalability, spanning from nanoscale to bulk thicknesses in various architectures. Utilizing a custom-designed Mathematica code based on the Transfer Matrix Approach (TMA) and Fresnel equations, we simulated the optical properties and a complete color palette of our produced MoS2, achieving remarkable alignment with experimental observations. By exploiting the freedom in substrate choice, control over thickness, and the annealing process, we established a correlation between the optical and electrical properties of the material. Furthermore, we demonstrated the method’s efficacy in fabricating a MoS2-based hyperbolic metamaterial by initially simulating the multilayer structure and pase diagram in a Mathematica code based on Effective Medium Theory (EMT) to determine the quantity of our composite to obtain the interesting hyperbolic dispersion relationship, highlighting its potential in advanced optoelectronic applications. Collectively, our study not only underscores the multifaceted advantages of the proposed deposition technique and the same material trends reported in the literature for MoS2 including the increase of the resistivity with both crystallinity and film thickness, but also paves the way for innovative MoS2-based device developments.

• Autores: Domínguez Ordóñez, Ramón Camilo
• Tipo de recurso: Trabajo de grado de pregrado
• Fecha de publicación: 2023
• Institución: Universidad del Valle
• Repositorio: Repositorio Digital Univalle
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.univalle.edu.co:10893/31356
• Acceso en línea: https://hdl.handle.net/10893/31356
• Palabra clave: Disulfuro de Molibdeno (MoS2); Pulverizacion catódica; Dispersión hiperbólica; Física
• Rights: openAccess
• License: Atribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)