| anubiszf |
2010-01-07 20:32 |
The spatial spectrum is obtained by using a lens to I7_D $a=
do Fourier transform and the far-field spectrum is recorded &aQ)x
by a CCD camera positioned in its focal plane. UmE{>5Pt
First, we summarize our results of on-axis excitation of a htRZ}e
single 2D gap soliton in Fig. 1. Different from previous ;$E[u)l
experimental observations in which either the probe beam #dt2'V- ,
was launched off-axis to match the edge of the first BZ [6] 7x]nY. \
or its input phase or spectrum was engineered [11], we "3MUrIsB>
demonstrate on-axis excitation of a 2D gap soliton without 7jbm w<d)9
a priori phase or spectral engineering. In fact, we show pdHb
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