Interference effect in scattering loss of high-index-contrast planar waveguides caused by boundary reflections

Abstract

We present theoretical and experimental results on an interference effect caused by boundary reflections on the optical scattering loss in high-index-contrast planar waveguides. Analytical expressions for the polarization-dependent scattering loss are derived using a surface Green’s function. For high-index-contrast waveguides of submicrometer dimensions a significant deviation from accepted theory arises, including scattering loss suppression owing to a thin-film interference effect. Our theoretical predictions are confirmed by loss measurements on silicon-on-insulator channel waveguides.

© 2008 Optical Society of America

Low-loss high-index-contrast planar waveguides with graded-index cladding layers

Juejun Hu, Ning-Ning Feng, Nathan Carlie, Laeticia Petit, Jianfei Wang, Anu Agarwal, Kathleen Richardson, and Lionel Kimerling
Opt. Express 15(22) 14566-14572 (2007)

Optical loss reduction in high-index-contrast chalcogenide glass waveguides via thermal reflow

Juejun Hu, Ning-Ning Feng, Nathan Carlie, Laeticia Petit, Anu Agarwal, Kathleen Richardson, and Lionel Kimerling
Opt. Express 18(2) 1469-1478 (2010)

High-index-contrast waveguides and devices

Mee-Koy Chin, Chee-Wei Lee, Shuh-Ying Lee, and Stevanus Darmawan
Appl. Opt. 44(15) 3077-3086 (2005)

Efficiency of evanescent excitation and collection of spontaneous Raman scattering near high index contrast channel waveguides

Ashim Dhakal, Ali Raza, Frédéric Peyskens, Ananth Z. Subramanian, Stéphane Clemmen, Nicolas Le Thomas, and Roel Baets
Opt. Express 23(21) 27391-27404 (2015)

Real photonic waveguides: guiding light through imperfections

Daniele Melati, Andrea Melloni, and Francesco Morichetti
Adv. Opt. Photon. 6(2) 156-224 (2014)