| anubiszf |
2010-01-07 20:32 |
The spatial spectrum is obtained by using a lens to '7LJuMp$#
do Fourier transform and the far-field spectrum is recorded bo ! ]
by a CCD camera positioned in its focal plane. S ]%U]
First, we summarize our results of on-axis excitation of a 4[C BW
single 2D gap soliton in Fig. 1. Different from previous 6O@ ^`T
experimental observations in which either the probe beam mc=! X
was launched off-axis to match the edge of the first BZ [6] 2 T(,H.O
or its input phase or spectrum was engineered [11], we y_4krY|Zx
demonstrate on-axis excitation of a 2D gap soliton without ji)4WG /1
a priori phase or spectral engineering. In fact, we show ;n7|.O]*
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