Nearly perfect and broadband optical absorption by TMDCs in cover/TMDC/spacer/Au/substrate multilayers

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...

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Published inApplied physics. B, Lasers and optics Vol. 126; no. 1
Main Authors Ansari, Narges, Mohebbi, Ensiyeh, Gholami, Fatemeh
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.01.2020
Springer Nature B.V
Subjects
Absorption
Applied physics
Broadband
Energy gap
Engineering
Gold
Lasers
Multilayers
Optical Devices
Optical properties
Optics
Optoelectronics
Photonics
Photovoltaic cells
Physical Chemistry
Physics
Physics and Astronomy
Quantum Optics
Substrates
Transfer matrices
Transition metal compounds
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Summary: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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ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-019-7352-3