| anubiszf |
2010-01-07 20:32 |
The spatial spectrum is obtained by using a lens to
4to)ff
do Fourier transform and the far-field spectrum is recorded &)UZ9r`z
by a CCD camera positioned in its focal plane. FT.6^)-
First, we summarize our results of on-axis excitation of a #-7 6E
single 2D gap soliton in Fig. 1. Different from previous Cjh0 .{
experimental observations in which either the probe beam >*DR>U
was launched off-axis to match the edge of the first BZ [6] >uVo 'S.
or its input phase or spectrum was engineered [11], we R*Jnl\?>@
demonstrate on-axis excitation of a 2D gap soliton without kKbq?} W[
a priori phase or spectral engineering. In fact, we show TJ k3z^.j
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