A bio-inspired anisotropic grating coupler design achieves 41% simulated vertical in-coupling efficiency and over 10 dB unidirectionality at 1550 nm in silicon photonics, with experimental unidirectionality of 12.8 dB.
Coupling strategies for silicon photonics integrated chips.Photonics Research, 7(2):201–239
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Moth's eye-inspired perfectly vertical subwavelength grating coupler for silicon photonics
A bio-inspired anisotropic grating coupler design achieves 41% simulated vertical in-coupling efficiency and over 10 dB unidirectionality at 1550 nm in silicon photonics, with experimental unidirectionality of 12.8 dB.