Phys. Rev. Lett. 100, 203904 (2008) [4 pages]Defect-Free Surface States in Modulated Photonic LatticesReceived 17 December 2007; revised 17 April 2008; published 23 May 2008 We predict that interfaces of periodically curved waveguide arrays can support a novel type of surface states which exist in a certain region of modulation parameters associated with the band flattening. Such linear surface states appear in truncated but otherwise perfect (defect-free) lattices as a direct consequence of the periodic modulation of the lattice potential. We show that the existence of these modes in different band gaps can be flexibly controlled by selecting the modulation profile, with no restrictions on Bloch-wave symmetries characteristic of Shockley states. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.203904
DOI:
10.1103/PhysRevLett.100.203904
PACS:
42.25.Gy, 42.82.Et
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