Abstract
Two-dimensional transition metal dichalcogenides (TMDCs) with direct bandgap and high optical absorption have opened a new horizon in photonics and optoelectronics. Increasing their absorption could greatly benefit their application, a subject still under debate. Thus, this study was focused on the plasmonic effect mediated by a thin gold layer and the role of individual spacer and cover layers or their combination in structures that include TMDC monolayers, namely, cover/TMDC/spacer/Au/substrate multilayers. The optical properties of these structures were investigated via the transfer matrix method in the visible wavelength region, revealing absorption values up to 99%. Such structures could be applied in the design of efficient optical absorbers for high-performance photovoltaic devices.
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