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- W4328112181 abstract "Non-linear metamaterials hold great promise for enhanced terahertz harmonic generation. Here, we numerically investigate enhanced terahertz third-harmonic generation (THG) by exploiting the symmetry-protected bound states in the continuum (BICs) in graphene grating-like metamaterial. By symmetry breaking of metamaterials, BICs transform into quasi-BICs. The high Q-factor and strong localized field enhancement is achieved at quasi-BICs, leading to a boosted THG process with low incident intensity of fundamental frequency. The THG conversion efficiency reaches 3.1% at an incident intensity of 100 kW/cm 2 . The remarkably enhanced non-linear optical process in the proposed non-linear metamaterial constitutes an outstanding platform for on-chip terahertz non-linear conversion applications." @default.
- W4328112181 created "2023-03-22" @default.
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- W4328112181 date "2023-03-21" @default.
- W4328112181 modified "2023-10-18" @default.
- W4328112181 title "Enhanced terahertz third-harmonic generation by bound states in the continuum in graphene grating-like metamaterial" @default.
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- W4328112181 doi "https://doi.org/10.3389/fphy.2023.1135211" @default.
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