Defect-free surface states in modulated photonic lattices

Details Defect-free surface states in modulated photonic lattices Defect-free surface states in modulated photonic lattices

2007-12-17

arxiv.org/abs/0712.2673v1

Phys.Rev.Lett.100:203904,2008

Physics

Optics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.100.203904

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.

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