Ultra-compact high efficiency and low crosstalk optical interconnection structures based on inverse designed nanophotonic elements.

ABSTRACT: In this paper, we combine inverse design concept and direct binary search algorithm to demonstrate three ultra-compact high efficiency and low crosstalk on-chip integrated optical interconnection basic devices in the entire wavelength range of 1,400-1600 nm based on silicon-on-insulator platform. A 90-degree waveguide bend with a footprint of only 2.4?×?2.4 ?m² is designed, whose transmission efficiency up to 0.18 dB. A waveguide crossing with a footprint of only 2.4?×?2.4 ?m² is designed, which can provide insertion loss of less than 0.5 dB and crosstalk (CL) of lower than?-?19 dB. A same direction waveguide crossing with footprint of only 2.4?×?3.6 ?m² is designed, which can provide the insertion loss of less than 0.56 dB and the crosstalk of lower than?-?21 dB. Then, we use them to form several ultra-compact optical interconnect basic structures and performed the simulation calculation. They overall achieve high performance. This will significantly improve the integration density.

SUBMITTER: Li Z 

PROVIDER: S-EPMC7371873 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature