Defect-free surface states in modulated photonic lattices

Abstract

We predict that interfaces of modulated photonic lattices can support a novel type of generic surface states. 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, without any embedded or nonlinearity-induced defects. This is in a sharp contrast to all previous studies, where surface states in linear or nonlinear lattices, such as Tamm or Shockley type surface states, are always associated with the presence of a certain type of structural or induced surface defect.

4 pages, 4 figures

References in corpus (2)

• Observation of surface gap solitons in semi-infinite waveguide arrays
• Broadband diffraction management and self-collimation of white light in photonic lattices

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