How to manipulate light on the nanoscale over wide frequency ranges


IMAGE: A global group has actually proposed an unique approach that permits to extensively extend this series of working frequencies of phonon polaritons in van der Waals products.
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Credit: (Source: University of Oviedo)

A global group led by scientists from the University of Oviedo and the Centre for Research in Nanomaterials and Nanotechnology (CINN-CSIC), together with researcher from the Basque proving ground CIC nanoGUNE, DIPC, Materials Physics Center (CSIC-UPV/EHU), and worldwide partners from the Chinese Academy of Sciences, Case Western Reserve University (USA), Austrian Institute of Technology, Paris Materials Centre, and University of Tokyo has actually found a reliable approach for managing the frequency of restricted light at the nanoscale in the kind of phonon polaritons (light paired to vibrations in the crystal). The outcomes have actually now been released in Nature Materials.

Research with nanolight based on phonon polaritons has actually established significantly over the last few years thanks to the usage of sheet-structured nanomaterials such as graphene, boron nitride or molybdenum trioxide: the so-called van der Waals products. Nanolight based on phonon polaritons is really appealing due to the fact that it can live longer than other kinds of nanolight, however among the primary downsides to the technological applications of this nanolight based on phonon polaritons is the minimal frequency ranges quality of each product, it exists just in narrow frequency area.

But now, a global group has actually proposed an unique approach that permits to extensively extend this series of working frequencies of phonon polaritons in van der Waals products. This consists in the intercalation of alkaline and alkaline earth atoms, such as salt, calcium or lithium, in the laminar structure of the van der Waals vanadium pentaoxide product, hence enabling to customize its atomic bonds and subsequently its optical residential or commercial properties.

Considering that a big range of ions and ion contents can be intercalated in layered products, on-need spectral action of phonon polaritons in van der Waals products can be anticipated, ultimately covering the entire mid-infrared variety, something vital for the emerging field of phonon polariton photonics.

The finding, released in the journal Nature Materials, will permit development in the advancement of compact photonic innovations, such as high-sensitivity biological sensing units or info and interaction innovations at the nanoscale.

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References

Javier Taboada-Gutiérrez, Gonzalo Álvarez-Pérez, Jiahua Duan, Weiliang Ma, Kyle Crowley, Iván Prieto, Andrei Bylinkin, Marta Autore, Halyna Volkova, Kenta Kimura, Tsuyoshi Kimura, M.-H. Berger, Shaojuan Li, Qiaoliang Bao, Xuan P. A. Gao, Ion Errea, Alexey Y. Nikitin, Rainer Hillenbrand, Javier Martín-Sánchez and Pablo Alonso-González

Broad spectral tuning of ultra-low-loss polaritons in a van der Waals crystal by intercalation

Nature Materials, 2020.

DOI: 10.1038/s41563-020-0665-0

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