학술논문
Sub-Decibel Off-Chip Fiber Couplers Based on L-Shaped Waveguides and Subwavelength Grating Metamaterials
Document Type
Conference
Author
Source
2019 IEEE 16th International Conference on Group IV Photonics (GFP) Group IV Photonics (GFP), 2019 IEEE 16th International Conference on. :1-2 Aug, 2019
Subject
Language
ISSN
1949-209X
Abstract
Uniform grating couplers based on versatile L-shaped waveguides are experimentally demonstrated, with coupling loss of −2.7 dB and back-reflections of −20 dB. Apodized couplers with subwavelength-grating metamaterials predict improved fiber-chip coupling down to −0.46 dB within device layouts compatible with lithographic technologies available in nanophotonic foundries.