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- W3039096416 abstract "Electromagnetic coupling is ubiquitous in photonic systems and transfers optical signals from one device to the other, creating crosstalk between devices. While this allows the functionality of some photonic components such as couplers, it limits the integration density of photonic chips, and many approaches have been proposed to reduce the crosstalk. However, due to the wave nature of light, complete elimination of crosstalk between closely spaced, identical waveguides is believed to be impossible and has not been observed experimentally. Here we show an exceptional coupling that can completely suppresses the crosstalk utilizing highly anisotropic photonic metamaterials. The anisotropic dielectric perturbations in the metamaterial mutually cancel the couplings from different field components, resulting in an infinitely long coupling length. We demonstrate the extreme suppression of crosstalk via exceptional coupling on a silicon-on-insulator platform, which is compatible with a complementary metal-oxide-semiconductor process. The idea of exceptional coupling with anisotropic metamaterials can be applied to many other electromagnetic devices, and it could drastically increase the integration density of photonic chips." @default.
- W3039096416 created "2020-07-10" @default.
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- W3039096416 date "2020-07-28" @default.
- W3039096416 modified "2023-10-10" @default.
- W3039096416 title "Exceptional coupling in photonic anisotropic metamaterials for extremely low waveguide crosstalk" @default.
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- W3039096416 doi "https://doi.org/10.1364/optica.394987" @default.
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