| anubiszf |
2010-01-07 20:32 |
The spatial spectrum is obtained by using a lens to :zY;eJK m
do Fourier transform and the far-field spectrum is recorded F{^\vFp
by a CCD camera positioned in its focal plane. {{?MO{Mh*
First, we summarize our results of on-axis excitation of a @ qi|}($
single 2D gap soliton in Fig. 1. Different from previous -xbs '[
experimental observations in which either the probe beam A@9\Qd
was launched off-axis to match the edge of the first BZ [6] [ r
or its input phase or spectrum was engineered [11], we I L,l XB<
demonstrate on-axis excitation of a 2D gap soliton without B!&y >Z^$
a priori phase or spectral engineering. In fact, we show ]=9 d'WL
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