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Proceedings Paper

Ultra low cross talk in crossed strip waveguides with the assistance of a photonic crystal cavity
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Paper Abstract

In this paper, ultra low cross talk is achieved by using a resonant cavity at the intersection between two strip waveguides formed in a square lattice photonic crystal structure (PhC). Two PhC structures are studied: one consists of cylindrical rods and another consists of cubic rods. The Q-Factor of the cavity is changed by increasing the number of rods that form the cavity and by decreasing the spacing between the waveguide and the cavity. Our two dimensional simulation results show that the latter method resulted in cross talk reduction of more than 21 dB for both structures. The overall cross talk was -90.50 dB for the cylindrical rods structure and -105.0 dB for the cubic rods structure. The optimized PhC structures were fabricated on a silicon-on-insulator platform. The rods were buried in silicon oxide in order to maximize the photonic band gap and provide index guiding in the vertical direction.

Paper Details

Date Published: 25 August 2008
PDF: 8 pages
Proc. SPIE 7056, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II, 70560E (25 August 2008); doi: 10.1117/12.795250
Show Author Affiliations
Rami A. Wahsheh, Rochester Institute of Technology (United States)
Zhaolin Lu, Rochester Institute of Technology (United States)
Mustafa A. G. Abushagur, Rochester Institute of Technology (United States)
Stefan F. Preble, Rochester Institute of Technology (United States)


Published in SPIE Proceedings Vol. 7056:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications II
Shizhuo Yin; Ruyan Guo, Editor(s)

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