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7 March 2014 Epsilon-near-zero-slot waveguides and their applications in ultrafast laser beam steering
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Recent research on epsilon-near-zero (or index-near-zero) materials has revealed their promising applications in optoelectronics. We explore a novel waveguide structure, namely “epsilon-near-zero-slot waveguide”, by utilizing transparent conducting oxides as the active medium, which can be tuned between epsilon-near-zero and epsilon-farfrom- zero by accumulation carriers, resulting in sharp effective index change. We propose laser beam steering by taking advantage of this epsilon-near-zero-slot waveguide structure. With about 60°steering angle being achieved, this waveguide structure has the advantages of ultra high speed and compact dimension, as well as easy fabrication.
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Kaifeng Shi, Wangshi Zhao, and Zhaolin Lu "Epsilon-near-zero-slot waveguides and their applications in ultrafast laser beam steering", Proc. SPIE 8980, Physics and Simulation of Optoelectronic Devices XXII, 89800L (7 March 2014);

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