Molina, Mario I.Garanovich, Ivan L.Sukhorukov, AndreyKivshar, Yuri2016-05-182016-05-180146-9592http://hdl.handle.net/1885/101434We analyze discrete surface modes in semi-infinite binary waveguide arrays, which can support simultaneously two types of discrete solitons. We demonstrate that the analysis of linear surface states in such arrays provides important information about the existence of nonlinear surface modes and their properties. We find numerically the families of both discrete surface solitons and nonlinear Tamm (gap) states and study their stability properties.This work has been supported by Fondo Nacional de Desarrollo Cientifico y Tecnológico grants 1050193 and 7050173 in Chile and by the Australian Research Council in Australia.© 2006 Optical Society of AmericaKeywords: Band structure; Electron energy levels; Solitons; Waveguides; Discrete solitons; Surface modes; Surface states; Waveguide arrays; Nonlinear optics2006-04-1110.1364/OL.31.0023322016-06-14