| Authors: | Z. Liu, G. Muliuk, J. Zhang, G. Roelkens, N. Le Thomas, R. Baets | | Title: | Micro-transfer printed silicon nitride grating couplers for efficient on-chip light coupling | | Format: | International Conference Proceedings | | Publication date: | 3/2022 | | Journal/Conference/Book: | SPIE Photonics West
| | Volume(Issue): | p.12004-75 | | Location: | San Francisco, United States | | Citations: | Look up on Google Scholar
| | Download: |
 (15.1MB) |
Abstract
We demonstrate a new post-processing approach to efficiently couple light in silicon nitride (Si3N4) photonic integrated circuits (PIC) via grating couplers. Thin-film coupons of apodised Si3N4 grating couplers functionalized with metallic bottom reflectors and adiabatic couplers are micro-transfer printed onto the input and output of Si3N4 waveguides, providing efficient coupling without jeopardizing the rest of the PIC. Two-dimensional FDTD simulations predict coupling efficiencies as large as 70% (-1.5dB) at a wavelength of 785nm. As a proof-of-concept, we report an experimental coupling efficiency of -4.6dB, which is 2.6dB better than the values obtained with standard designs of grating couplers. Related Research Topics
|
|
