Journal
APPLIED OPTICS
Volume 50, Issue 15, Pages 2294-2298Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.50.002294
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- Natural Sciences and Engineering Research Council (NSERC) of Canada [480586]
- BiopSys Network [486537]
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Hybrid waveguides consisting of a metal plane separated from a high-index medium by a low-index spacer have recently attracted a lot of interest. TM and TE modes are guided in two different layers in these structures and their properties can be controlled in different manners by changing the waveguide dimensions and material properties. We examine the effects of different parameters on the characteristics of the two modes in such structures. We show that by properly choosing the dimensions, it is possible to cut off the TE mode while the TM mode can still be guided in a well-confined manner. Using this property of the hybrid guide, we propose a TM-pass polarizer. The proposed device is very compact and compatible with the silicon-on-insulator platform. Finite-difference time-domain simulation indicates that such a polarizer can provide a high extinction of the TE mode for a reasonable insertion loss of the TM mode. (C) 2011 Optical Society of America
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