| anubiszf |
2010-01-07 20:32 |
The spatial spectrum is obtained by using a lens to OrP i ("/
do Fourier transform and the far-field spectrum is recorded [x[ nTIg
by a CCD camera positioned in its focal plane. 9 `+RmX;m
First, we summarize our results of on-axis excitation of a X+7@8)1(
single 2D gap soliton in Fig. 1. Different from previous nG4}8
experimental observations in which either the probe beam )`5=6i
was launched off-axis to match the edge of the first BZ [6] IeN~ E'~
or its input phase or spectrum was engineered [11], we !-AK@`i.
demonstrate on-axis excitation of a 2D gap soliton without EBMZ7b-7
a priori phase or spectral engineering. In fact, we show }Gf9.ACQ
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