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Broad spectral tuning of ultra-low-loss polaritons in a van der Waals crystal by intercalation
- Source :
- Digital.CSIC. Repositorio Institucional del CSIC, instname, Nature Materials, Nature Materials, Nature Publishing Group, 2020, ⟨10.1038/s41563-020-0665-0⟩
- Publication Year :
- 2020
- Publisher :
- Springer Nature, 2020.
-
Abstract
- Phonon polaritons—light coupled to lattice vibrations—in polar van der Waals crystals are promising candidates for controlling the flow of energy on the nanoscale due to their strong field confinement, anisotropic propagation and ultra-long lifetime in the picosecond range1,2,3,4,5. However, the lack of tunability of their narrow and material-specific spectral range—the Reststrahlen band—severely limits their technological implementation. Here, we demonstrate that intercalation of Na atoms in the van der Waals semiconductor α-V2O5 enables a broad spectral shift of Reststrahlen bands, and that the phonon polaritons excited show ultra-low losses (lifetime of 4 ± 1 ps), similar to phonon polaritons in a non-intercalated crystal (lifetime of 6 ± 1 ps). We expect our intercalation method to be applicable to other van der Waals crystals, opening the door for the use of phonon polaritons in broad spectral bands in the mid-infrared domain.<br />J.T.-G. and G.Á.-P. acknowledge support through the Severo Ochoa Program from the Government of the Principality of Asturias (nos. PA-18-PF-BP17-126 and PA-20-PF-BP19-053, respectively). J.M.-S. acknowledges finantial support from the Clarín Programme from the Government of the Principality of Asturias and a Marie Curie-COFUND grant (PA-18-ACB17-29) and the Ramón y Cajal Program from the Government of Spain (RYC2018-026196-I). K.C., X.P.A.G., H.V. and M.H.B. acknowledge the Air Force Office of Scientific Research (AFOSR) grant no. FA 9550-18-1-0030 for funding support. I.E. acknowledges financial support from the Spanish Ministry of Economy and Competitiveness (grant no. FIS2016-76617-P). A.Y.N. acknowledges the Spanish Ministry of Science, Innovation and Universities (national project no. MAT2017-88358-C3-3-R) and the Basque Government (grant no. IT1164-19). Q.B. acknowledges the support from Australian Research Council (grant nos. FT150100450, IH150100006 and CE170100039). R.H. acknowledges support from the Spanish Ministry of Economy, Industry, and Competitiveness (national project RTI2018-094830-B-100 and the Project MDM-2016-0618 of the María de Maeztu Units of Excellence Program) and the Basque Goverment (grant no. IT1164-19). P.A.-G. acknowledges support from the European Research Council under starting grant no. 715496, 2DNANOPTICA.
- Subjects :
- Materials science
Phonon
Intercalation (chemistry)
Nanophotonics
Physics::Optics
02 engineering and technology
010402 general chemistry
01 natural sciences
7. Clean energy
Molecular physics
Crystal
symbols.namesake
Condensed Matter::Materials Science
Condensed Matter::Superconductivity
Polariton
General Materials Science
[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]
business.industry
Mechanical Engineering
General Chemistry
Spectral bands
021001 nanoscience & nanotechnology
Condensed Matter Physics
0104 chemical sciences
Semiconductor
Mechanics of Materials
symbols
van der Waals force
0210 nano-technology
business
Subjects
Details
- ISSN :
- 14761122 and 14764660
- Database :
- OpenAIRE
- Journal :
- Digital.CSIC. Repositorio Institucional del CSIC, instname, Nature Materials, Nature Materials, Nature Publishing Group, 2020, ⟨10.1038/s41563-020-0665-0⟩
- Accession number :
- edsair.doi.dedup.....1cd91753b7b8304ca75666d2b7d128f2