Optical Response of CVD-Grown ML-WS2 Flakes on an Ultra-Dense Au NP Plasmonic Array

• DOI: 10.3390/chemosensors10030120
• Publication Date: 2022-03-21T17:24:59Z
• Authors: Marzia Ferrera; Lorenzo Ramò; Domenica Convertino; Giorgio Orlandini; Simona Pace; Ilya Milekhin; Michele Magnozzi; Mahfujur Rahaman; Dietrich R. T. Zahn; Camilla Coletti; Maurizio Canepa; Francesco Bisio
• Keywords: micro-optical spectroscopies; TRANSITION-METAL DICHALCOGENIDES, MONOLAYER, OPTOELECTRONICS, NANOSTRUCTURES; QD415-436; 02 engineering and technology; 2D materials; hybrid systems; Biochemistry; 7. Clean energy; plasmonics; plasmonics; 2D materials; hybrid systems; micro-optical spectroscopies; 2D materials; hybrid systems; micro-optical spectroscopies; plasmonics; 0210 nano-technology

The combination of metallic nanostructures with two-dimensional transition metal dichalcogenides is an efficient way to make the optical properties latter more appealing for opto-electronic applications. In this work, we investigate monolayer WS2 flakes grown by chemical vapour deposition and transferred onto a densely-packed array plasmonic Au nanoparticles (NPs). response was measured as function thickness dielectric spacer intercalated between two materials system temperature, in 75–350 K range. We show that weak interaction established NPs, leading temperature- spacer-thickness-dependent coupling localized surface plasmon resonance NPs exciton. suggest closely-packed morphology promotes high confinement electromagnetic field regions inaccessible deposited on top. This allows achievement direct contact while preserving strong connotation also hybrid system.