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Twist Angle Tuning ...
Twist Angle Tuning of Moiré Exciton Polaritons in van der Waals Heterostructures
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- Fitzgerald, Jamie, 1992 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Thompson, J. J.P. (author)
- Philipps-Universität Marburg,Philipps University Marburg
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- Malic, Ermin, 1980 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Philipps-Universität Marburg,Philipps University Marburg
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(creator_code:org_t)
- 2022-05-20
- 2022
- English.
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In: Nano Letters. - : American Chemical Society (ACS). - 1530-6992 .- 1530-6984. ; 22:11, s. 4468-4474
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Abstract
Subject headings
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- Twisted atomically thin semiconductors are characterized by moiré excitons. Their optical signatures and selection rules are well understood. However, their hybridization with photons in the strong coupling regime for heterostructures integrated in an optical cavity has not been the focus of research yet. Here, we combine an excitonic density matrix formalism with a Hopfield approach to provide microscopic insights into moiré exciton polaritons. In particular, we show that exciton-light coupling, polariton energy, and even the number of polariton branches can be controlled via the twist angle. We find that these new hybrid light-exciton states become delocalized relative to the constituent excitons due to the mixing with light and higher-energy excitons. The system can be interpreted as a natural quantum metamaterial with a periodicity that can be engineered via the twist angle. Our study presents a significant advance in microscopic understanding and control of moiré exciton polaritons in twisted atomically thin semiconductors.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- transition metal dichalcogenides
- van der Waals hetero-bilayers
- moiré excitons
- polaritons
Publication and Content Type
- art (subject category)
- ref (subject category)
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