Enhancing Plasmon-Exciton Interaction: Gold Nanotriangle Arrays Coupled with Monolayers of MoSe2
* Department of Physics, University of Cincinnati, Cincinnati, OH 45221, USA
** Semiconductor Physics and Center for Materials, Architectures, and Integration of Nano
membranes (MAIN), Chemnitz University of Technology, D-09107 Chemnitz, Germany
*** Department of Physics, Xavier University, Cincinnati, OH 45207, USA
Abstract
This research investigates the properties of hybrid nanostructures created by combining plasmonic elements with 2-dimensional transition metal dichalcogenides (TMDCs). The study involves integrating arrays of gold nanotriangles (NTs) with monolayers of mechanically exfoliated MoSe2 on a sapphire substrate. The photoluminescence observed at room temperature from single and bilayer MoSe2 samples reveals exciton emission wavelengths of 786 nm and 807 nm, respectively. A precise array of gold NTs is thermally deposited on top of MoSe2 monolayers by utilizing nanosphere lithography with polystyrene beads. The shape and height of the gold NTs are characterized by Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM). Transmission measurements explore the shift in the plasmon resonance of the gold NT arrays depending on the NT height and the exciton transition in the combined MoSe2 monolayer/gold NT samples. The experimental findings are supported by COM-SOL simulations.This research opens new avenues for the practical application of plasmon-coupled TMDC nanostructures. 120 rialeigenschaften
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