Broad Spectral Tuning of Ultra-Low Loss Polaritons in a van der Waals Crystal by Intercalation
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866913651592527872 |
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| author | Taboada-Gutiérrez, Javier Álvarez-Pérez, Gonzalo Duan, Jiahua Ma, Weiliang Crowley, Kyle Prieto, Iván Bylinkin, Andrei Autore, Marta Volkova, Halyna Kimura, Kenta Kimura, Tsuyoshi Berger, M. -H. Li, Shaojuan Bao, Qiaoliang Gao, Xuan P. A. Errea, Ion Nikitin, Alexey Hillenbrand, Rainer Martín-Sánchez, Javier Alonso-González, Pablo |
| author_facet | Taboada-Gutiérrez, Javier Álvarez-Pérez, Gonzalo Duan, Jiahua Ma, Weiliang Crowley, Kyle Prieto, Iván Bylinkin, Andrei Autore, Marta Volkova, Halyna Kimura, Kenta Kimura, Tsuyoshi Berger, M. -H. Li, Shaojuan Bao, Qiaoliang Gao, Xuan P. A. Errea, Ion Nikitin, Alexey Hillenbrand, Rainer Martín-Sánchez, Javier Alonso-González, Pablo |
| contents | Phonon polaritons (PhPs) -- light coupled to lattice vibrations -- in polar van der Waals (vdW) crystals are promising candidates for controlling the flow of energy at the nanoscale due to their strong field confinement, anisotropic propagation, and ultra-long lifetime in the picosecond range \cite{ref1,ref2,ref3,ref4,ref5}. However, the lack of tunability in their narrow and material-specific spectral range -- the Reststrahlen Band (RB) -- severely limits their technological implementation. Here, we demonstrate that the intercalation of Na atoms in the vdW semiconductor $α$-V$_2$O$_5$ enables a broad spectral shift of RBs, and that the PhPs excited exhibit ultra-low losses (lifetime of $4 \pm 1$~ps), similar to PhPs in the non-intercalated crystal (lifetime of $6 \pm 1$ ps). We expect our intercalation method to be applicable to other vdW crystals, opening the door for the use of PhPs in broad spectral bands in the mid-infrared domain. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_08705 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Broad Spectral Tuning of Ultra-Low Loss Polaritons in a van der Waals Crystal by Intercalation Taboada-Gutiérrez, Javier Álvarez-Pérez, Gonzalo Duan, Jiahua Ma, Weiliang Crowley, Kyle Prieto, Iván Bylinkin, Andrei Autore, Marta Volkova, Halyna Kimura, Kenta Kimura, Tsuyoshi Berger, M. -H. Li, Shaojuan Bao, Qiaoliang Gao, Xuan P. A. Errea, Ion Nikitin, Alexey Hillenbrand, Rainer Martín-Sánchez, Javier Alonso-González, Pablo Optics Materials Science Phonon polaritons (PhPs) -- light coupled to lattice vibrations -- in polar van der Waals (vdW) crystals are promising candidates for controlling the flow of energy at the nanoscale due to their strong field confinement, anisotropic propagation, and ultra-long lifetime in the picosecond range \cite{ref1,ref2,ref3,ref4,ref5}. However, the lack of tunability in their narrow and material-specific spectral range -- the Reststrahlen Band (RB) -- severely limits their technological implementation. Here, we demonstrate that the intercalation of Na atoms in the vdW semiconductor $α$-V$_2$O$_5$ enables a broad spectral shift of RBs, and that the PhPs excited exhibit ultra-low losses (lifetime of $4 \pm 1$~ps), similar to PhPs in the non-intercalated crystal (lifetime of $6 \pm 1$ ps). We expect our intercalation method to be applicable to other vdW crystals, opening the door for the use of PhPs in broad spectral bands in the mid-infrared domain. |
| title | Broad Spectral Tuning of Ultra-Low Loss Polaritons in a van der Waals Crystal by Intercalation |
| topic | Optics Materials Science |
| url | https://arxiv.org/abs/2501.08705 |