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Opt Express. 2006 Aug 7;14(16):7362-7.

Observation of lower to higher bandgap transition of one-dimensional defect modes.

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  • 1Department of Physics and Astronomy, San Francisco State University, CA 94132, USA.


We demonstrate one-dimensional optically-induced photonic lattices with a negative defect and observe linear bandgap guidance in such a defect. We show that a defect mode moves from the first bandgap to a higher bandgap as the lattice potential is increased. Our experimental results are in good agreement with the theoretical analysis of these effects.

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