Wide-angle beam refocusing using negative refraction in non-uniform photonic crystal waveguides

The phenomena of beam-steering and negative ray refraction in a graded 2D photonic crystal structure interface with plane tapered transitions to homogeneous waveguide regions is used for efficient far-field refocusing of highly divergent Gaussian beams. It is shown by numerical simulation that a 14m...

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Bibliographic Details
Published inOptics express Vol. 13; no. 15; pp. 5719 - 5730
Main Authors Zengerle, Remigius, Hoang, Phuong
Format Journal Article
LanguageEnglish
Published United States 25.07.2005
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Summary:The phenomena of beam-steering and negative ray refraction in a graded 2D photonic crystal structure interface with plane tapered transitions to homogeneous waveguide regions is used for efficient far-field refocusing of highly divergent Gaussian beams. It is shown by numerical simulation that a 14microm long photonic crystal structure is able to refocus a small-spot Gaussian beam with an efficiency of about 90%.
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ISSN:1094-4087
DOI:10.1364/OPEX.13.005719