Steering and cloaking of hyperbolic polaritons at deep-subwavelength scales

Hanchao Teng, Na Chen, Hai Hu (), F. Javier García de Abajo and Qing Dai ()
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Hanchao Teng: National Center for Nanoscience and Technology
Na Chen: National Center for Nanoscience and Technology
Hai Hu: National Center for Nanoscience and Technology
F. Javier García de Abajo: The Barcelona Institute of Science and Technology
Qing Dai: National Center for Nanoscience and Technology

Nature Communications, 2024, vol. 15, issue 1, 1-6

Abstract: Abstract Polaritons are well-established carriers of light, electrical signals, and even heat at the nanoscale in the setting of on-chip devices. However, the goal of achieving practical polaritonic manipulation over small distances deeply below the light diffraction limit remains elusive. Here, we implement nanoscale polaritonic in-plane steering and cloaking in a low-loss atomically layered van der Waals (vdW) insulator, α-MoO3, comprising building blocks of customizable stacked and assembled structures. Each block contributes specific characteristics that allow us to steer polaritons along the desired trajectories. Our results introduce a natural materials-based approach for the comprehensive manipulation of nanoscale optical fields, advancing research in the vdW polaritonics domain and on-chip nanophotonic circuits.

Date: 2024
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DOI: 10.1038/s41467-024-48318-w

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