Journal article
High-Performance Multimode Interference Coupler in Silicon Waveguides With Subwavelength Structures
Abstract
The performance of multimode interference (MMI) couplers in silicon waveguides is limited by the high lateral refractive index contrast. Here we propose the use of subwavelength gratings (SWGs) in the lateral cladding regions of the MMI to reduce the index contrast. Our approach significantly reduces the mode phase error while at the same time allowing a single etch step process. Using a z-periodic lateral SWG, we design a 2 × 4 MMI that …
Authors
Ortega-Monux A; Zavargo-Peche L; Maese-Novo A; Molina-Fernandez I; Halir R; Wanguemert-Perez JG; Cheben P; Schmid JH
Journal
IEEE Photonics Technology Letters, Vol. 23, No. 19, pp. 1406–1408
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Publication Date
October 1, 2011
DOI
10.1109/lpt.2011.2161866
ISSN
1041-1135