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Room-temperature valley-selective emission in Si-MoSe₂ heterostructures enabled by high-quality-factor chiroptical cavities

Here, the authors create a high-quality-factor chiral metasurface that enables record-high room-temperature valley-selective emission in MoSe₂ monolayers, independent of excitation polarization.

Feng Pan
Xin Li
Jennifer A. Dionne
ResearchOpen Access29 Nov 2025
Nature Communications

Volume: 17, P: 1-11
Photoinduced twist and untwist of moiré superlattices

Femtosecond photoexcitation drives a coherent twist–untwist motion of the moiré superlattice in 2° and 57° twisted WSe₂/MoSe₂ heterobilayers.

Cameron J. R. Duncan
Amalya C. Johnson
Fang Liu
Research12 Nov 2025
Nature

Volume: 647, P: 619-624
Photoluminescence upconversion in monolayer WSe₂ activated by plasmonic cavities through resonant excitation of dark excitons

Here, the authors perform statistical measurements on hundreds of plasmonic nano-cavities embedding WSe₂ monolayers, and show the activation of anti-Stokes photoluminescence in WSe₂ through resonant excitation of a dark exciton at room temperature.

Niclas S. Mueller
Rakesh Arul
Jeremy J. Baumberg
ResearchOpen Access15 Sept 2023
Nature Communications

Volume: 14, P: 1-9
Giant room-temperature nonlinearities in a monolayer Janus topological semiconductor

Electronic band topology may be leveraged to enhance nonlinear optical properties in monolayer semiconductors. Here, the authors report giant room-temperature nonlinearity enhancements in Janus transition metal dichalcogenides.

Jiaojian Shi
Haowei Xu
Aaron M. Lindenberg
ResearchOpen Access16 Aug 2023
Nature Communications

Volume: 14, P: 1-8
A Purcell-enabled monolayer semiconductor free-space optical modulator

By engineering the plasmonic response of a nanopatterned silver gate electrode, the radiative decay rate of excitons in a tungsten disulfide monolayer can be enhanced via the Purcell effect, creating high modulation efficiencies at room temperature.

Qitong Li
Jung-Hwan Song
Mark L. Brongersma
Research17 Jul 2023
Nature Photonics

Volume: 17, P: 897-903
Floquet engineering of strongly driven excitons in monolayer tungsten disulfide

The interaction of strong laser fields with tungsten disulfide leads to light-dressed Floquet replica of excitonic states, which manifest as new features in the transient absorption spectrum.

Yuki Kobayashi
Christian Heide
Shambhu Ghimire
Research05 Jan 2023
Nature Physics

Volume: 19, P: 171-176

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Room-temperature valley-selective emission in Si-MoSe2 heterostructures enabled by high-quality-factor chiroptical cavities

Photoinduced twist and untwist of moiré superlattices

Photoluminescence upconversion in monolayer WSe2 activated by plasmonic cavities through resonant excitation of dark excitons

Giant room-temperature nonlinearities in a monolayer Janus topological semiconductor

A Purcell-enabled monolayer semiconductor free-space optical modulator

Floquet engineering of strongly driven excitons in monolayer tungsten disulfide

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Room-temperature valley-selective emission in Si-MoSe₂ heterostructures enabled by high-quality-factor chiroptical cavities

Photoluminescence upconversion in monolayer WSe₂ activated by plasmonic cavities through resonant excitation of dark excitons