Interface nano-optics with van der Waals polaritons

Qing Zhang, Guangwei Hu, Weiliang Ma, Peining Li, Alex Krasnok, Rainer Hillenbrand, Andrea Alù () and Cheng-Wei Qiu ()
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Qing Zhang: National University of Singapore
Guangwei Hu: National University of Singapore
Weiliang Ma: Huazhong University of Science and Technology
Peining Li: Huazhong University of Science and Technology
Alex Krasnok: City University of New York
Rainer Hillenbrand: UPV/EHU
Andrea Alù: City University of New York
Cheng-Wei Qiu: National University of Singapore

Nature, 2021, vol. 597, issue 7875, 187-195

Abstract: Abstract Polaritons are hybrid excitations of matter and photons. In recent years, polaritons in van der Waals nanomaterials—known as van der Waals polaritons—have shown great promise to guide the flow of light at the nanoscale over spectral regions ranging from the visible to the terahertz. A vibrant research field based on manipulating strong light–matter interactions in the form of polaritons, supported by these atomically thin van der Waals nanomaterials, is emerging for advanced nanophotonic and opto-electronic applications. Here we provide an overview of the state of the art of exploiting interface optics—such as refractive optics, meta-optics and moiré engineering—for the control of van der Waals polaritons. This enhanced control over van der Waals polaritons at the nanoscale has not only unveiled many new phenomena, but has also inspired valuable applications—including new avenues for nano-imaging, sensing, on-chip optical circuitry, and potentially many others in the years to come.

Date: 2021
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DOI: 10.1038/s41586-021-03581-5

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