Twisted Light: Phonon Control of Excitons in Moiré Superlattices
![The study demonstrates that interlayer excitons in heterostructures of 2H-MoSe2/WSe2 exhibit helicity-dependent photoluminescence, revealing distinct excitation pathways: direct electronic transitions following resonant excitation of individual layer excitons or interlayer singlets, and chiral-phonon-assisted excitation which transfers pseudo-angular momentum to the excitonic system, ultimately influencing the formation of interlayer excitons with specific polarization characteristics [latex]IX^{-}_{T}[/latex].](https://arxiv.org/html/2512.21125v1/Figures/Article_Fig3-V3_bis.png)
Researchers have discovered a way to selectively excite and control the chirality of interlayer excitons trapped within moiré superlattices using chiral optical phonons.
![The study demonstrates that interlayer excitons in heterostructures of 2H-MoSe2/WSe2 exhibit helicity-dependent photoluminescence, revealing distinct excitation pathways: direct electronic transitions following resonant excitation of individual layer excitons or interlayer singlets, and chiral-phonon-assisted excitation which transfers pseudo-angular momentum to the excitonic system, ultimately influencing the formation of interlayer excitons with specific polarization characteristics [latex]IX^{-}_{T}[/latex].](https://arxiv.org/html/2512.21125v1/Figures/Article_Fig3-V3_bis.png)
Researchers have discovered a way to selectively excite and control the chirality of interlayer excitons trapped within moiré superlattices using chiral optical phonons.
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