Efficient Optical Chip Interfacing in Silicon Nitride Photonics
Year: 2026
Type: conference-paper
Abstract: Integrated photonics underpins a wide range of applications, including high-speed optical communications, advanced computing, and quantum technologies. A persistent challenge in these systems is efficient light coupling between standard single-mode optical fibers and sub-micrometer on-chip waveguides, which remains a major bottleneck for overall system performance. This work reports recent advances in compact surface grating couplers implemented on the silicon nitride (Si3N4) photonic platform. Several CMOS-compatible native grating architectures are introduced and demonstrated, targeting improved mode matching and radiation efficiency in the short-wave-infrared regime. Experimental results demonstrate single-etch Si3N4surface grating couplers with coupling losses in the range of −6 dB to −3 dB.
Source: Photonics North (PN)
Authors: Daniel Benedikovic, Radovan Korcek, William Fraser, Adam Petrovic, Quentin Willmart, David Medina, Samson Edmond, Thalia Dominguez Bucio, Frederic Gardes, Cameron Horvath, Shurui Wang, Martin Vachon, Rubin Ma, Dan-Xia Xu, Jan Litvik, Ivan Glesk, Pavel Cheben, Jens H. Schmid, Laurent Vivien, Carlos Alonso-Ramos, Winnie N. Ye
Language: English
Topic: Photonic and Optical Devices
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7204178689