| anubiszf |
2010-01-07 20:32 |
The spatial spectrum is obtained by using a lens to <0P `ct0,i
do Fourier transform and the far-field spectrum is recorded &ukNzV}VW
by a CCD camera positioned in its focal plane. xmKa8']x
First, we summarize our results of on-axis excitation of a =D5@PHpv(
single 2D gap soliton in Fig. 1. Different from previous 2BH>TmS
experimental observations in which either the probe beam > 0 !J]gK
was launched off-axis to match the edge of the first BZ [6] P@9>4}r$
or its input phase or spectrum was engineered [11], we Z.6`O1OY}?
demonstrate on-axis excitation of a 2D gap soliton without QXJ D' c
a priori phase or spectral engineering. In fact, we show $ajw]2kx
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