Back to Search
Start Over
Metasurface Deflector Enhanced Grating Coupler for Perfectly Vertical Coupling.
- Source :
- Photonics; Apr2023, Vol. 10 Issue 4, p436, 11p
- Publication Year :
- 2023
-
Abstract
- We propose a perfectly vertical coupling scheme based on metasurface deflectors (meta-deflectors) and grating couplers (GCs). An approach for optimizing the GCs based on the Gaussian-fitting using the genetic algorithm is proposed. An meta-deflector based on amorphous silicon (a-Si) pillars is designed to the optimal coupling angle of the GC to ensure good coupling efficiency (CE). Simulations predict peak vertical CE to be 78% at the wavelength of 2 μm, with 1 dB bandwidth ≥35 nm. The design process of GC and meta-deflector is provided in detail, and the influence of fabrication error on the CE is analyzed. [ABSTRACT FROM AUTHOR]
- Subjects :
- COUPLING schemes
AMORPHOUS silicon
DIRECTIONAL couplers
GENETIC algorithms
Subjects
Details
- Language :
- English
- ISSN :
- 23046732
- Volume :
- 10
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Photonics
- Publication Type :
- Academic Journal
- Accession number :
- 163454782
- Full Text :
- https://doi.org/10.3390/photonics10040436