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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2405.08851 |
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| _version_ | 1866909203137822720 |
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| author | Jin, Xin Aglieri, Vincenzo Jeong, Young-Gyun Pezeshki, Atiye Skokan, Lilian Shagar, Mostafa Jia, Yuechen Bianucci, Pablo Ruediger, Andreas Orgiu, Emanuele Toma, Andrea Razzari, Luca |
| author_facet | Jin, Xin Aglieri, Vincenzo Jeong, Young-Gyun Pezeshki, Atiye Skokan, Lilian Shagar, Mostafa Jia, Yuechen Bianucci, Pablo Ruediger, Andreas Orgiu, Emanuele Toma, Andrea Razzari, Luca |
| contents | Two-dimensional materials, including transition metal dichalcogenides, are attractive for a variety of applications in electronics as well as photonics and have recently been envisioned as an appealing platform for phonon polaritonics. However, their direct characterization in the terahertz spectral region, of interest for retrieving, e.g., their phonon response, represents a major challenge, due to the limited sensitivity of typical terahertz spectroscopic tools and the weak interaction of such long-wavelength radiation with sub-nanometer systems. In this work, by exploiting an ad-hoc engineered metallic surface enabling a ten-thousand-fold local absorption boost, we perform enhanced terahertz spectroscopy of a monolayer transition metal dichalcogenide (tungsten diselenide) and extract its dipole-active phonon resonance features. In addition, we use these data to obtain the monolayer effective permittivity around its phonon resonance. Via the direct terahertz characterization of the phonon response of such two-dimensional systems, this method opens the path to the rational design of phonon polariton devices exploiting monolayer transition metal dichalcogenides. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_08851 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Enhanced Terahertz Spectroscopy of a Monolayer Transition Metal Dichalcogenide Jin, Xin Aglieri, Vincenzo Jeong, Young-Gyun Pezeshki, Atiye Skokan, Lilian Shagar, Mostafa Jia, Yuechen Bianucci, Pablo Ruediger, Andreas Orgiu, Emanuele Toma, Andrea Razzari, Luca Optics Two-dimensional materials, including transition metal dichalcogenides, are attractive for a variety of applications in electronics as well as photonics and have recently been envisioned as an appealing platform for phonon polaritonics. However, their direct characterization in the terahertz spectral region, of interest for retrieving, e.g., their phonon response, represents a major challenge, due to the limited sensitivity of typical terahertz spectroscopic tools and the weak interaction of such long-wavelength radiation with sub-nanometer systems. In this work, by exploiting an ad-hoc engineered metallic surface enabling a ten-thousand-fold local absorption boost, we perform enhanced terahertz spectroscopy of a monolayer transition metal dichalcogenide (tungsten diselenide) and extract its dipole-active phonon resonance features. In addition, we use these data to obtain the monolayer effective permittivity around its phonon resonance. Via the direct terahertz characterization of the phonon response of such two-dimensional systems, this method opens the path to the rational design of phonon polariton devices exploiting monolayer transition metal dichalcogenides. |
| title | Enhanced Terahertz Spectroscopy of a Monolayer Transition Metal Dichalcogenide |
| topic | Optics |
| url | https://arxiv.org/abs/2405.08851 |