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Far-field coupling between moiré photonic lattices
Jun Guan1, Jingtian Hu2, Yi Wang3
1Department of Chemistry, Northwestern University, Evanston, IL, USA. junguan2021@u.northwestern.edu.
Nature Nanotechnology
|February 13, 2023
Summary
Researchers discovered ultralong-range coupling between photonic lattices in moiré architectures. This far-field interlattice coupling, mediated by dark surface lattice resonances, enables twist-angle-controlled directional lasing emission over large distances.
Area of Science:
- Photonics
- Nanophotonics
- Condensed Matter Physics
Background:
- Moiré patterns, formed by superposing periodic structures, are promising for light manipulation.
- Current moiré-facilitated phenomena are limited to the immediate vicinity of the moiré lattices.
Purpose of the Study:
- To investigate ultralong-range coupling between photonic lattices in moiré architectures.
- To explore the potential of dark surface lattice resonances for mediating interlattice coupling.
- To demonstrate twist-angle-controlled directional lasing emission in separated plasmonic nanoparticle lattices.
Main Methods:
- Fabrication of bilayer and multilayer moiré architectures with plasmonic nanoparticle lattices.
- Utilizing dark surface lattice resonances for vertical coupling.
- Characterizing lasing emission properties as a function of lattice separation and twist angle.
Main Results:
- Observed ultralong-range coupling between photonic lattices in moiré systems.
- Demonstrated that coupling can exceed distances three orders of magnitude larger than lattice periodicity.
- Achieved twist-angle-controlled directional lasing emission from spatially separated lattices.
Conclusions:
- Far-field interlattice coupling mediated by dark surface lattice resonances is possible in moiré photonic architectures.
- This coupling mechanism enables directional lasing emission over unprecedented distances.
- The out-of-plane dimension can be exploited for nanoscale and microscale optical manipulation.
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