TY - JOUR
T1 - Spatiotemporal evolution and multiple self-focusing of ultrashort pulses in a resonant two-level medium
AU - Niu, Yueping
AU - Xia, Keyu
AU - Cui, Ni
AU - Gong, Shangqing
AU - Li, Ruxin
PY - 2008/12/30
Y1 - 2008/12/30
N2 - The spatiotemporal evolutions of ultrashort pulses in two dimensions are investigated numerically by solving the coupled Maxwell-Bloch equations without invoking the slowly varying envelope approximation and rotating-wave approximation. For an on-axis 2nπ sech pulse, local delay makes the temporal split 2π sech pulses crescent-shaped in the transverse distribution. Due to the transverse effect, the temporal split 2π sech pulses become unstable and experience reshaping during the propagation process. Then, interference occurs between the successive crescent-shaped pulses and multiple self-focusing can form.
AB - The spatiotemporal evolutions of ultrashort pulses in two dimensions are investigated numerically by solving the coupled Maxwell-Bloch equations without invoking the slowly varying envelope approximation and rotating-wave approximation. For an on-axis 2nπ sech pulse, local delay makes the temporal split 2π sech pulses crescent-shaped in the transverse distribution. Due to the transverse effect, the temporal split 2π sech pulses become unstable and experience reshaping during the propagation process. Then, interference occurs between the successive crescent-shaped pulses and multiple self-focusing can form.
UR - http://www.scopus.com/inward/record.url?scp=58149269293&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.78.063835
DO - 10.1103/PhysRevA.78.063835
M3 - Article
AN - SCOPUS:58149269293
SN - 1050-2947
VL - 78
SP - 1
EP - 5
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 6
M1 - 063835
ER -