Slab waveguide theory for general multi-slot waveguide. Issue 13 (19th July 2016)

• Record Type: Journal Article
• Authors: Le, ZiChun; Yin, LiXiang; Zou, Yu; Wu, Xiang
• Is Part Of: Journal of modern optics. Volume 63:Issue 13(2016)
• Page Start: 1260
• Page End: 1269
• Publication Date: 2016-07-19
• Subjects: Integrated optics -- slot waveguide -- multi-slab waveguide theory; Optics -- Periodicals; 535
• DOI: 10.1080/09500340.2015.1137369
• Languages: English
• ISSNs: 0950-0340

Abstract

Abstract: Optical devices based on slot waveguide are of considerable interest in numerous applications due to the distinct feature of strong electric field confinement in a low-refractive index region. A theoretical model based on multi-slab waveguide theory is used to reveal the physical mechanism of the slot waveguide. The calculation results derived from the basic Helmholtz equation for the conventional single-slot waveguide with a ~2% validation of the effective refractive index are compared to the former experiment results by the Cornell University group. Moreover, we extend the theoretical model to a general multi-slot waveguide. Its electric field distribution and key properties such as optical power confinement factor and enhancement factor in slot are deduced theoretically and fully discussed.