Sub-wavelength optical lattice in 2D materials
Year: 2025
Type: article
Abstract: Recently, light-matter interaction has been vastly expanded as a control tool for inducing and enhancing many emergent nonequilibrium 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 “nonlocal” pump-probe scheme where MPPs are excited to induce a spatially modulated AC Stark shift for excitons in a monolayer of MoSe2, several microns away from the illumination spot. 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.
DOI: 10.13016/m2lzrd-zqxo
Authors: Sarkar, Supratik, Mehrabad, Mahmoud Jalali, Suarez-Forero, Daniel G., Gu, Liuxin, Flower, Christopher J., Xu, Lida, Watanabe, Kenji, Taniguchi, Takashi, Park, Suji, Jang, Houk, Zhou, You, Hafezi, Mohammad
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7084669352
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