On-chip silicon photonic nanohole metamaterials enabled high-density waveguide arrays.
Opt Express
; 32(11): 19792-19800, 2024 May 20.
Article
em En
| MEDLINE
| ID: mdl-38859105
ABSTRACT
High-density silicon waveguide arrays manufactured on a complementary metal-oxide-semiconductor (CMOS)-foundry platform hold great promise for optical information processing and photonic integration. However, evanescent waves arising from nanoscale confinement would cause significant optical crosstalk in waveguide arrays, which remains a vital issue in various applications. Here, by utilizing silicon photonic nanohole metamaterials, we propose a scheme to greatly suppress the crosstalk in the devices and then demonstrate ultra-compact low-crosstalk waveguide arrays. For a 100-µm-long waveguide array at a half-wavelength pitch, low crosstalk of -19â
dB can be obtained in a wide range of wavelengths (1500â
nm-1580â
nm). In the experimental demonstrations, our approach exhibits the ability to suppress the crosstalk over a broad bandwidth without substantially increasing the propagation loss as well as the promising design flexibility, which shall pave the way for metamaterials enabled high-density waveguide arrays.
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MEDLINE
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En
Ano de publicação:
2024
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Article