Abstract

We numerically investigate the lateral leakage loss behavior for TM-like modes in silicon-on-insulator ridge waveguides. In order to improve the leakage loss properties, we propose a novel ridge waveguide structure where a dimple is introduced at the ridge center. It is shown that the ridge waveguide with a dimple is both low loss and fabrication tolerant. This behavior is predicted by not only an accurate finite-element-based analysis but also a simple, phenomenological effective-index-based analysis.

© 2008 Optical Society of America

Lateral leakage of TM-like mode in thin-ridge Silicon-on-Insulator bent waveguides and ring resonators

Thach G. Nguyen, Ravi S. Tummidi, Thomas L. Koch, and Arnan Mitchell
Opt. Express 18(7) 7243-7252 (2010)

Lateral leakage in TM-like whispering gallery mode of thin-ridge silicon-on-insulator disk resonators

Thach G. Nguyen, Ravi S. Tummidi, Thomas L. Koch, and Arnan Mitchell
Opt. Lett. 34(7) 980-982 (2009)

Tuning the lateral leakage loss of TM-like modes in shallow-etched waveguides using liquid crystals

Thomas Ako, Jeroen Beeckman, Wim Bogaerts, and Kristiaan Neyts
Appl. Opt. 53(2) 214-220 (2014)

A design method of lithium niobate on insulator ridge waveguides without leakage loss

Emi Saitoh, Yuki Kawaguchi, Kunimasa Saitoh, and Masanori Koshiba
Opt. Express 19(17) 15833-15842 (2011)

Thin-ridge Silicon-on-Insulator waveguides with directional control of lateral leakage radiation

Naser Dalvand, Thach G. Nguyen, Ravi S. Tummidi, Thomas L. Koch, and Arnan Mitchell
Opt. Express 19(6) 5635-5643 (2011)