Title
Extension of Marcatili's analytical approach for rectangular silicon optical waveguides
Author
Westerveld, W.J.
Leinders, S.M.
van Dongen, K.W.A.
Urbach, H.P.
Yousefi, M.
Publication year
2012
Abstract
Marcatili's famous approximate analytical description of light propagating through rectangular dielectric waveguides, published in 1969, gives accurate results for low-index-contrast waveguides. However, photonic-integrated circuit technology has advanced to high-index-contrast (HIC) waveguides. In this paper, we improve Marcatili's model by adjusting the amplitudes of the components of the electromagnetic fields in his description. We find that Marcatili's eigenvalue equation for the propagation constant is also valid for HIC waveguides. Our improved method shows much better agreement with rigorous numerical simulations, in particular for the case of HIC waveguides. We also derive explicit expressions for the effective group index and the effects of external forces on the propagation constant. Furthermore, with our method, the phenomenon of avoided crossing of modes is observed and studied. © 1983-2012 IEEE.
Subject
Physics & Electronics
NI - Nano Instrumentation
TS - Technical Sciences
Electronics
Industrial Innovation
electromagnetic fields
electromagnetic propagation
integrated optics
optical sensors
optical waveguides
silicon-on-insulator (SOI) technology
To reference this document use:
http://resolver.tudelft.nl/uuid:0359c4fc-e2ce-4071-9d44-e09139b36591
TNO identifier
462182
ISSN
0733-8724
Source
Journal of Lightwave Technology, 30 (14), 2388-2401
Article number
No.: 6200293
Document type
article