Work

High-Tolerance Grating Couplers for Vertical Backside Coupling

Year: 2024

Type: article

Abstract: To facilitate convenient packaging of photonic integrated circuits on a fiber tip, a silicon grating coupler designed for vertical backside coupling has been developed. In order to comply with foundry capabilities and streamline the fabrication processes, the grating coupler features a minimum feature size larger than 200 nm and a single-etched structure on silicon. By inverse design-based optimization, the vertical backside grating coupler achieves a coupling efficiency of nearly 40% (−3.97 dB), while showcasing high fabrication and misalignment tolerance.

Source: Applied Sciences

DOI: 10.3390/app142311015

Authors: Jui-Hung Chen, Arthur D. Bouamra, Chia-Ling Wu, Andrea Fiore, Shuo-Yen Tseng

Institutions: National Cheng Kung University, Eindhoven University of Technology

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,728

Funders: National Science and Technology Council, Nederlandse Organisatie voor Wetenschappelijk Onderzoek