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Observation of defect-free surface modes in optical waveguide arrays

: Szameit, A.; Garanovich, I.L.; Heinrich, M.; Sukhorukov, A.A.; Dreisow, F.; Pertsch, T.S.; Nolte, S.; Tünnermann, A.; Kivshar, Y.S.


Physical review letters 101 (2008), Nr.20, Art. 203902, 4 S.
ISSN: 0031-9007
ISSN: 1079-7114
Fraunhofer IOF ()

We report on the experimental observation of novel defect-free surface modes predicted theoretically for modulated photonic lattices [I. L. Garanovich et al., Phys. Rev. Lett. 100, 203904 (2008)].We generate the linear surface modes in truncated arrays of periodically curved optical waveguides created in fused silica by a laser direct-writing technique. Our results demonstrate that the degree of surface wave localization can be controlled by selecting the waveguide bending amplitude.