| anubiszf |
2010-01-07 20:32 |
The spatial spectrum is obtained by using a lens to `T70FsSJ
do Fourier transform and the far-field spectrum is recorded #-;BU{3 *
by a CCD camera positioned in its focal plane. my1kF%?
First, we summarize our results of on-axis excitation of a { 9Y'v
single 2D gap soliton in Fig. 1. Different from previous U]|q4!WE
experimental observations in which either the probe beam ca =e_sg
was launched off-axis to match the edge of the first BZ [6] | 6> _L6t
or its input phase or spectrum was engineered [11], we z' lNO| nU
demonstrate on-axis excitation of a 2D gap soliton without e@O A>
a priori phase or spectral engineering. In fact, we show }>0
Kc=
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