Sub-wavelength optical lattice in 2D materials
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arXiv
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| Autori principali: | , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
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| _version_ | 1866912271632957440 |
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| author | Sarkar, Supratik Mehrabad, Mahmoud Jalali Suárez-Forero, Daniel G. Gu, Liuxin Flower, Christopher J. Xu, Lida Watanabe, Kenji Taniguchi, Takashi Park, Suji Jang, Houk Zhou, You Hafezi, Mohammad |
| author_facet | Sarkar, Supratik Mehrabad, Mahmoud Jalali Suárez-Forero, Daniel G. Gu, Liuxin Flower, Christopher J. Xu, Lida Watanabe, Kenji Taniguchi, Takashi Park, Suji Jang, Houk Zhou, You Hafezi, Mohammad |
| contents | Recently, light-matter interaction has been vastly expanded as a control tool for inducing and enhancing many emergent non-equilibrium phenomena. However, conventional schemes for exploring such light-induced phenomena rely on uniform and diffraction-limited free-space optics, which limits the spatial resolution and the efficiency of light-matter interaction. Here, we overcome these challenges using metasurface plasmon polaritons (MPPs) to form a sub-wavelength optical lattice. Specifically, we report a ``non-local" pump-probe scheme where MPPs are excited to induce a spatially modulated AC Stark shift for excitons in a monolayer of MoSe$_2$, several microns away from the illumination spot. Remarkably, we identify nearly two orders of magnitude reduction for the required modulation power compared to the free-space optical illumination counterpart. Moreover, we demonstrate a broadening of the excitons' linewidth as a robust signature of MPP-induced periodic sub-diffraction modulation. Our results will allow exploring power-efficient light-induced lattice phenomena below the diffraction limit in active chip-compatible MPP architectures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_00464 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Sub-wavelength optical lattice in 2D materials Sarkar, Supratik Mehrabad, Mahmoud Jalali Suárez-Forero, Daniel G. Gu, Liuxin Flower, Christopher J. Xu, Lida Watanabe, Kenji Taniguchi, Takashi Park, Suji Jang, Houk Zhou, You Hafezi, Mohammad Mesoscale and Nanoscale Physics Optics Recently, light-matter interaction has been vastly expanded as a control tool for inducing and enhancing many emergent non-equilibrium phenomena. However, conventional schemes for exploring such light-induced phenomena rely on uniform and diffraction-limited free-space optics, which limits the spatial resolution and the efficiency of light-matter interaction. Here, we overcome these challenges using metasurface plasmon polaritons (MPPs) to form a sub-wavelength optical lattice. Specifically, we report a ``non-local" pump-probe scheme where MPPs are excited to induce a spatially modulated AC Stark shift for excitons in a monolayer of MoSe$_2$, several microns away from the illumination spot. Remarkably, we identify nearly two orders of magnitude reduction for the required modulation power compared to the free-space optical illumination counterpart. Moreover, we demonstrate a broadening of the excitons' linewidth as a robust signature of MPP-induced periodic sub-diffraction modulation. Our results will allow exploring power-efficient light-induced lattice phenomena below the diffraction limit in active chip-compatible MPP architectures. |
| title | Sub-wavelength optical lattice in 2D materials |
| topic | Mesoscale and Nanoscale Physics Optics |
| url | https://arxiv.org/abs/2406.00464 |