| anubiszf |
2010-01-07 20:32 |
The spatial spectrum is obtained by using a lens to s~@4
do Fourier transform and the far-field spectrum is recorded y~.k-b<{[
by a CCD camera positioned in its focal plane. p7UdZOi2
First, we summarize our results of on-axis excitation of a F__j]}?
single 2D gap soliton in Fig. 1. Different from previous x<m{B@3T
experimental observations in which either the probe beam gEVN;G'B<=
was launched off-axis to match the edge of the first BZ [6] kEH(\3,l
or its input phase or spectrum was engineered [11], we .Ulrv5wJ
demonstrate on-axis excitation of a 2D gap soliton without }9& Z#1/
a priori phase or spectral engineering. In fact, we show 0w0\TWz*
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