TY - JOUR
T1 - Truncated-Bloch-wave solitons in optical lattices
AU - Wang, Jiandong
AU - Yang, Jianke
AU - Alexander, Tristram J.
AU - Kivshar, Yuri S.
PY - 2009/4/1
Y1 - 2009/4/1
N2 - We study self-trapped localized nonlinear states in the form of truncated Bloch waves in one-dimensional optical lattices, which appear in the gaps of the linear band-gap spectrum. We demonstrate the existence of families of such localized states which differ by the number of intensity peaks. These families do not bifurcate from the band edge, and their power curves exhibit double branches. Linear-stability analysis demonstrates that in deep lattice potentials, the states corresponding to the lower branches are stable, whereas those corresponding to the upper branches are unstable, independently of the number of peaks.
AB - We study self-trapped localized nonlinear states in the form of truncated Bloch waves in one-dimensional optical lattices, which appear in the gaps of the linear band-gap spectrum. We demonstrate the existence of families of such localized states which differ by the number of intensity peaks. These families do not bifurcate from the band edge, and their power curves exhibit double branches. Linear-stability analysis demonstrates that in deep lattice potentials, the states corresponding to the lower branches are stable, whereas those corresponding to the upper branches are unstable, independently of the number of peaks.
UR - http://www.scopus.com/inward/record.url?scp=65549098846&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.79.043610
DO - 10.1103/PhysRevA.79.043610
M3 - Article
SN - 1050-2947
VL - 79
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 4
M1 - 043610
ER -