Hyperspectral Absorption of Semiconductor Monolayer Crystals

Quantum many-body theory is applied to discover the design principles of broadband absorbers based on III-nitride or transition metal dichalcogenide monolayer crystals. A combination of color-chirped exciton absorption and continuum-absorption-based coupling strategies is outlined and demonstrated t...

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Published in2020 Conference on Lasers and Electro-Optics (CLEO) Vol. 116; no. 18; pp. 1 - 2
Main Authors Wen, Q., Lu, X., Wu, Y., Wang, P., Laleyan, D., Bayerl, D., Kioupakis, E., Mi, Z., Kira, M.
Format Conference Proceeding Journal Article
LanguageEnglish
Published Melville OSA 04.05.2020
American Institute of Physics
Subjects
Absorption
Applied physics
Broadband
Chirp
Color
Couplings
Crystals
Excitons
Gallium nitride
Micrometers
Monolayers
Photovoltages
Transition metal compounds
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Summary:Quantum many-body theory is applied to discover the design principles of broadband absorbers based on III-nitride or transition metal dichalcogenide monolayer crystals. A combination of color-chirped exciton absorption and continuum-absorption-based coupling strategies is outlined and demonstrated to enable hyperspectral absorption with several eV bandwidth. The found structures are only a few micrometers thick and dominantly support direct generation of free carriers at optimal photovoltages.
Bibliography:ObjectType-Article-1
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ISSN:0003-6951
1077-3118
DOI:10.1063/5.0004119