| anubiszf |
2010-01-07 20:32 |
The spatial spectrum is obtained by using a lens to $e,'<Jl
do Fourier transform and the far-field spectrum is recorded 4" Pf0PD:
by a CCD camera positioned in its focal plane. ~ tqDh(
First, we summarize our results of on-axis excitation of a >~\CiV4^
single 2D gap soliton in Fig. 1. Different from previous pv,I_"
experimental observations in which either the probe beam vkW]?::Cfd
was launched off-axis to match the edge of the first BZ [6] >FReGiK$T
or its input phase or spectrum was engineered [11], we $(;0;!t.
demonstrate on-axis excitation of a 2D gap soliton without YMn_9s7<
a priori phase or spectral engineering. In fact, we show i,y7R?-K
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