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Proceedings Paper

Sharp trench waveguide bend with photonic crystals: simulation, fabrication and characterisation
Author(s): Xudong Cui; Christian Hafner; Franck Robin; Daniel Erni; Kakhaber Tavzarashvili; Ruediger Vahldieck
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Paper Abstract

In this paper, a three dimensional analysis of an ultra-compact sharp trench waveguide bend structure modified with small local photonic crystals is presented. The structure used here is based on a previous proposal [1]. To fully investigate the behavior of the structure, especially mode coupling and off plane radiation losses - (that are ignored in two dimensional calculations [1]) as well as the limitations caused by the effective index approximation in the two-dimensional (2D) simulations, we simulated realistic three dimensional structures using the finite integration technique. Furthermore, a structure on an InP substrate is compared with a Si/SiO2 based structure in order to check the influence of vertical index contrast on the device performance. One of the structures based on InP substrate was then fabricated and characterized to validate our conceptual predictions.

Paper Details

Date Published: 18 June 2007
PDF: 11 pages
Proc. SPIE 6617, Modeling Aspects in Optical Metrology, 66170D (18 June 2007); doi: 10.1117/12.726017
Show Author Affiliations
Xudong Cui, ETH Zurich (Switzerland)
Christian Hafner, ETH Zurich (Switzerland)
Franck Robin, ETH Zurich (Switzerland)
Daniel Erni, Univ. of Duisburg-Essen (Germany)
Kakhaber Tavzarashvili, ETH Zurich (Switzerland)
Ruediger Vahldieck, ETH Zurich (Switzerland)

Published in SPIE Proceedings Vol. 6617:
Modeling Aspects in Optical Metrology
Harald Bosse; Bernd Bodermann; Richard M. Silver, Editor(s)

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